CA2172873C - Method of determining optical amplifier failures - Google Patents
Method of determining optical amplifier failures Download PDFInfo
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- CA2172873C CA2172873C CA002172873A CA2172873A CA2172873C CA 2172873 C CA2172873 C CA 2172873C CA 002172873 A CA002172873 A CA 002172873A CA 2172873 A CA2172873 A CA 2172873A CA 2172873 C CA2172873 C CA 2172873C
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- performance parameter
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- transmission channel
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/2912—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form characterised by the medium used for amplification or processing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0797—Monitoring line amplifier or line repeater equipment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/293—Signal power control
- H04B10/2931—Signal power control using AGC
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/297—Bidirectional amplification
- H04B10/2971—A single amplifier for both directions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2210/00—Indexing scheme relating to optical transmission systems
- H04B2210/08—Shut-down or eye-safety
Abstract
The invention is directed to a failure detection system and method for detecting malfunction of an optical amplifier module with one or multiple transmission channels. The failure detection system comprises means for measuring a performance parameter of the module; means for providing an expected performance parameter; and a comparator unit for receiving the performance parameter and the expected performance parameter and producing an error signal when the performance parameter substantially departs from the expected performance parameter. The system also includes a display/alarm unit for receiving the error signal and accordingly signaling failure of said module. The performance parameter is an output value of the module; a correspondence between an output value and an input value for a transmission channel; a figure of merit(FOMt=t); a set of gains (g) for all transmission channels; and the dynamic range of the amplifier module.
Claims (36)
1. A failure detection system for an optical amplifier module, comprising:
means for measuring a performance parameter of said module;
a memory unit for providing a predetermined expected performance parameter;
a comparator unit for receiving said performance parameter and said expected performance parameter and producing an error signal when said performance parameter departs from said expected performance parameter; and a display/alarm unit for receiving said error signal and accordingly signaling a failure of said module.
means for measuring a performance parameter of said module;
a memory unit for providing a predetermined expected performance parameter;
a comparator unit for receiving said performance parameter and said expected performance parameter and producing an error signal when said performance parameter departs from said expected performance parameter; and a display/alarm unit for receiving said error signal and accordingly signaling a failure of said module.
2. A failure detection system for an optical amplifier module, comprising:
means for measuring a performance parameter of said module;
a memory unit for providing a predetermined expected performance parameter;
and a comparator unit for receiving said performance parameter and said expected performance parameter and producing an error signal when said performance parameter departs from said expected performance parameter, wherein said means for measuring further comprises:
means for supplying an input value as a function of the power of an incoming optical signal received by said amplifier module on a transmission channel; and means for supplying an output value as a function of the power of an outgoing optical signal transmitted by said amplifier module on said transmission channel.
means for measuring a performance parameter of said module;
a memory unit for providing a predetermined expected performance parameter;
and a comparator unit for receiving said performance parameter and said expected performance parameter and producing an error signal when said performance parameter departs from said expected performance parameter, wherein said means for measuring further comprises:
means for supplying an input value as a function of the power of an incoming optical signal received by said amplifier module on a transmission channel; and means for supplying an output value as a function of the power of an outgoing optical signal transmitted by said amplifier module on said transmission channel.
3. A failure detection system for an optical amplifier module, comprising:
means for measuring a performance parameter of said module;
a memory unit that stores an expected performance parameter; and a comparator unit for receiving said performance parameter and said expected performance parameter and producing an error signal when said performance parameter departs from said expected performance parameter, wherein said means for measuring further comprises:
means for supplying an input value as a functions of the power of an incoming optical signal received by said amplifier module on a transmission channel; and means for supplying an output value as a function of the power of an outgoing optical signal transmitted by said amplifier module on said transmission channel; and wherein said comparator unit comprises:
a first comparator for comparing said output value with a provisioned output value stored in said memory unit and producing said error signal; and a second comparator for comparing, in response to said error signal, said input value to a threshold stored in said memory unit and producing one of a module fail alarm signal and input low alarm signal.
means for measuring a performance parameter of said module;
a memory unit that stores an expected performance parameter; and a comparator unit for receiving said performance parameter and said expected performance parameter and producing an error signal when said performance parameter departs from said expected performance parameter, wherein said means for measuring further comprises:
means for supplying an input value as a functions of the power of an incoming optical signal received by said amplifier module on a transmission channel; and means for supplying an output value as a function of the power of an outgoing optical signal transmitted by said amplifier module on said transmission channel; and wherein said comparator unit comprises:
a first comparator for comparing said output value with a provisioned output value stored in said memory unit and producing said error signal; and a second comparator for comparing, in response to said error signal, said input value to a threshold stored in said memory unit and producing one of a module fail alarm signal and input low alarm signal.
4. A failure detection system for an optical amplifier module, comprising:
means for measuring a performance parameter of said module;
a memory unit that stores an expected performance parameter; and a comparator unit for receiving said performance parameter and said expected performance parameter and producing an error signal when said performance parameter departs from said expected performance parameter, wherein said means for measuring further comprises:
means for supplying an input value as a function of the power of an incoming optical signal received be said amplifier module on a transmission channel;
means for supplying an output value as a function of the power of an outgoing optical signal transmitted by said amplifier module on said transmission channel;
means for estimating the amplified spontaneous emission (ASE) value;
means for supplying a pump power value as a function of the power injected by a laser pump of said amplifier module on said transmission channel; and a calculation unit for receiving said input value, said output value, said ASE
value, and said pump power value and determining a figure of merit as said expected performance parameter.
means for measuring a performance parameter of said module;
a memory unit that stores an expected performance parameter; and a comparator unit for receiving said performance parameter and said expected performance parameter and producing an error signal when said performance parameter departs from said expected performance parameter, wherein said means for measuring further comprises:
means for supplying an input value as a function of the power of an incoming optical signal received be said amplifier module on a transmission channel;
means for supplying an output value as a function of the power of an outgoing optical signal transmitted by said amplifier module on said transmission channel;
means for estimating the amplified spontaneous emission (ASE) value;
means for supplying a pump power value as a function of the power injected by a laser pump of said amplifier module on said transmission channel; and a calculation unit for receiving said input value, said output value, said ASE
value, and said pump power value and determining a figure of merit as said expected performance parameter.
5. A failure detection system for a multi-channel optical amplifier module having a plurality (M) of transmission channels, comprising:
means for measuring a performance parameter of said module;
memory for storing a predetermined expected performance parameter; and a comparator unit for comparing said performance parameter with said expected performance parameter and producing an error signal when said performance parameter departs from said expected performance parameter.
means for measuring a performance parameter of said module;
memory for storing a predetermined expected performance parameter; and a comparator unit for comparing said performance parameter with said expected performance parameter and producing an error signal when said performance parameter departs from said expected performance parameter.
6. A failure detection system as claimed in claim 5, further comprising a display/alarm unit for receiving said error signal and accordingly indicating a failure of said module.
7. A failure detection system for a multi-channel optical amplifier module having a plurality (M) of transmission channels, comprising:
means for measuring a performance parameter of said module;
a memory unit for storing an expected performance parameter; and a comparator unit for comparing said performance parameter with said expected performance parameter and producing an error signal when said performance parameter departs from said expected performance parameter, wherein said means for measuring comprises:
means for supplying an input value (I m) for each transmission channel (m) as a function of the power of an incoming optical signal received by said amplifier module on said transmission channel (m), where m is an integer m~ [1,M]; and means for supplying an output value (O m) for each transmission channel (m), as a function of the power of an outgoing optical signal transmitted by said amplifier module on said transmission channel (m).
means for measuring a performance parameter of said module;
a memory unit for storing an expected performance parameter; and a comparator unit for comparing said performance parameter with said expected performance parameter and producing an error signal when said performance parameter departs from said expected performance parameter, wherein said means for measuring comprises:
means for supplying an input value (I m) for each transmission channel (m) as a function of the power of an incoming optical signal received by said amplifier module on said transmission channel (m), where m is an integer m~ [1,M]; and means for supplying an output value (O m) for each transmission channel (m), as a function of the power of an outgoing optical signal transmitted by said amplifier module on said transmission channel (m).
8. A failure detection system as claimed in claim 7, wherein said means for measuring further comprises:
a first calculation arrangement for receiving said (M) output values and determining a combined measured output value F(O);and a second calculation arrangement for receiving said (M) input values and determining a combined measured input value J(I).
a first calculation arrangement for receiving said (M) output values and determining a combined measured output value F(O);and a second calculation arrangement for receiving said (M) input values and determining a combined measured input value J(I).
9. A failure detection system as claimed in claim 8, wherein said comparator unit comprises:
a first comparator for comparing said combined measured output value F(O) with a combined provisioned output value stored in said memory unit and producing said error signal; and a second comparator for comparing, in response to said error signal, said combined input value with a threshold (T) stored in said memory unit and generating one of a module fail alarm signal and input low alarm signal.
a first comparator for comparing said combined measured output value F(O) with a combined provisioned output value stored in said memory unit and producing said error signal; and a second comparator for comparing, in response to said error signal, said combined input value with a threshold (T) stored in said memory unit and generating one of a module fail alarm signal and input low alarm signal.
10. A failure detection system as claimed in claim 7, wherein said means for measuring comprises:
a minimum detector for determining a first transmission channel (n) having the minimum wavelength;
means for determining a first gain (g m) and a second gain (gn), said first and second gains being calculated as a function of the ratio between said output and said input values for said respective transmission channels (m) and (n);
a first calculation arrangement for receiving said second gain g n, and receiving from said memory unit a corresponding calibrated gain G n, and calibrated gain tilt coefficients C n and C m for said transmission channels (n) and (m) respectively, calculating a first term as a difference (g n -G n), and adjusting said difference according to the ratio C
n/C m; and a second calculation arrangement for receiving said gain g m, receiving from said memory unit a corresponding calibrated gain G m, and calculating a second term as a difference (g m-G m).
a minimum detector for determining a first transmission channel (n) having the minimum wavelength;
means for determining a first gain (g m) and a second gain (gn), said first and second gains being calculated as a function of the ratio between said output and said input values for said respective transmission channels (m) and (n);
a first calculation arrangement for receiving said second gain g n, and receiving from said memory unit a corresponding calibrated gain G n, and calibrated gain tilt coefficients C n and C m for said transmission channels (n) and (m) respectively, calculating a first term as a difference (g n -G n), and adjusting said difference according to the ratio C
n/C m; and a second calculation arrangement for receiving said gain g m, receiving from said memory unit a corresponding calibrated gain G m, and calculating a second term as a difference (g m-G m).
11. A failure detection system as claimed in claim 10, where said comparator unit compares said adjusted first term with said second term.
12. A failure detection system as claimed in claim 7, wherein said means for comparing comprises:
a first comparator for receiving said measured output value (O m) and comparing each output value with a corresponding provisioned output value (P m) and accordingly generating said error signal; and a second comparator for comparing, in response to said error signal, said input value I1 with a record I1Max, I1Min extracted from said memory means, and generating one of a module fail alarm signal and a fault alarm signal.
a first comparator for receiving said measured output value (O m) and comparing each output value with a corresponding provisioned output value (P m) and accordingly generating said error signal; and a second comparator for comparing, in response to said error signal, said input value I1 with a record I1Max, I1Min extracted from said memory means, and generating one of a module fail alarm signal and a fault alarm signal.
13. A failure detection system as claimed in claim 7, wherein said means for measuring comprises:
means for detecting a plurality of gain values (g m), each representing the ratio between the power of an outgoing optical signal and the power of a corresponding incoming optical signal for a respective transmission channel (m);
means for extracting from said memory a plurality (M) of calibrated gain tilt coefficients for all said transmission channels;
a maximum detector for identifying a pair of channels (n) and (m) having a maximum difference between the respective gain tilt coefficients;
a first calculation arrangement for receiving said gain values (g n) and (g m) and calculating an ASE value (FASE calc); and a second calculation arrangement for receiving said ASE value (FASE calc), an input ASE value, measured in said incoming optical signal and an output ASE value measured in said outgoing optical signal and producing an output loss signal.
means for detecting a plurality of gain values (g m), each representing the ratio between the power of an outgoing optical signal and the power of a corresponding incoming optical signal for a respective transmission channel (m);
means for extracting from said memory a plurality (M) of calibrated gain tilt coefficients for all said transmission channels;
a maximum detector for identifying a pair of channels (n) and (m) having a maximum difference between the respective gain tilt coefficients;
a first calculation arrangement for receiving said gain values (g n) and (g m) and calculating an ASE value (FASE calc); and a second calculation arrangement for receiving said ASE value (FASE calc), an input ASE value, measured in said incoming optical signal and an output ASE value measured in said outgoing optical signal and producing an output loss signal.
14. A failure detecting system as claimed in claim 13, wherein said comparator unit comprises a comparator for receiving said output loss signal and a target output loss signal from said memory means and accordingly producing said error signal.
15. A method for detecting failure of an optical amplifier module, comprising the steps of:
providing a predetermined expected performance parameter for said module;
measuring a performance parameter of said module;
comparing said performance parameter with said expected performance parameter to generate an error signal when said performance parameter is different from said expected performance parameter; and triggering an alarm/display unit with a true/false signal for accordingly indicating a failure of said module.
providing a predetermined expected performance parameter for said module;
measuring a performance parameter of said module;
comparing said performance parameter with said expected performance parameter to generate an error signal when said performance parameter is different from said expected performance parameter; and triggering an alarm/display unit with a true/false signal for accordingly indicating a failure of said module.
16. A method for detecting failure of an optical amplifier module, comprising the steps of:
providing an expected performance parameter for said module;
measuring a performance parameter of said module;
comparing said performance parameter with said expected performance parameter to generate an error signal when said performance parameter is different from said expected performance parameter; and triggering an alarm/display unit with a true/false signal for accordingly indicating a failure of said module, wherein said step of measuring comprises:
measuring, for a plurality (M) of transmission channels, an input value I m, representative of the power of an incoming optical signal on each transmission channel (m);
and measuring, for said plurality (M) of transmission channels, an output value representative of the power of an outgoing optical signal on each transmission channel (m).
providing an expected performance parameter for said module;
measuring a performance parameter of said module;
comparing said performance parameter with said expected performance parameter to generate an error signal when said performance parameter is different from said expected performance parameter; and triggering an alarm/display unit with a true/false signal for accordingly indicating a failure of said module, wherein said step of measuring comprises:
measuring, for a plurality (M) of transmission channels, an input value I m, representative of the power of an incoming optical signal on each transmission channel (m);
and measuring, for said plurality (M) of transmission channels, an output value representative of the power of an outgoing optical signal on each transmission channel (m).
17. A method as claimed in claim 16, wherein said performance parameter is said output value, and said expected performance parameter is a provisioned output value for said transmission channel (m).
18. A method as claimed in claim 16, wherein said performance parameter is a correspondence between said output value and said input value, and said expected parameter is a correspondence between a provisioned output value and a threshold for a transmission channel (m).
19. A method as claimed in claim 16, wherein said performance parameter is a correspondence between a combined input value and a combined output value for all said (M) transmission channels, and said expected performance parameter is a correspondence between a threshold and a combined provisioned output value.
20. A method as claimed in claim 16, wherein said performance parameter is a figure of merit (FOM t=t) and said expected performance parameter is a provisioned figure of merit (FOM t=0).
21. A method as claimed in claim 20, wherein said step of measuring comprises:
determining an input photon flowrate FSIGI n for a transmission channel (n) from said input value;
determining an output photon flowrate FSIGO n for said transmission channel (n) from said output value;
measuring a pump value representative of the power of a laser pump and determining a value FPUMP in;
measuring the value of ASE detected in an incoming optical signal and determining a value FASE in; and measuring the ASE detected in an outgoing optical signal and determining a value FASE out.
determining an input photon flowrate FSIGI n for a transmission channel (n) from said input value;
determining an output photon flowrate FSIGO n for said transmission channel (n) from said output value;
measuring a pump value representative of the power of a laser pump and determining a value FPUMP in;
measuring the value of ASE detected in an incoming optical signal and determining a value FASE in; and measuring the ASE detected in an outgoing optical signal and determining a value FASE out.
22. A method as claimed in claim 21, wherein said step of measuring further comprises calculating said figure of merit using the formula:
23. A method as claimed in claim 21, wherein said step of measuring further comprises calculating said figure of merit using the formula:
24. A method as claimed in claim 16, wherein said performance parameter is a gain tilt error (e m) and said expected performance parameter is an error threshold.
25. A method as claimed in claim 24, wherein said step of measuring comprises:
determining a gain (g m) for a transmission channel (m) as a ratio between said output value and said input value for each transmission channel; and determining a transmission channel (n) with the smallest wavelength.
determining a gain (g m) for a transmission channel (m) as a ratio between said output value and said input value for each transmission channel; and determining a transmission channel (n) with the smallest wavelength.
26. A method as claimed in claim 25, wherein said step of providing an expected performance parameter comprises:
establishing by calibrated measurement an expected gain G m for each transmission channel (m);
measuring a gain tilt coefficient C m defining the expected relative change in said gain G m; and storing said expected gains, said gain tilt coefficients, and said error threshold in a memory unit.
establishing by calibrated measurement an expected gain G m for each transmission channel (m);
measuring a gain tilt coefficient C m defining the expected relative change in said gain G m; and storing said expected gains, said gain tilt coefficients, and said error threshold in a memory unit.
27. A method as claimed in claim 26, wherein said step of measuring further comprises calculating said gain tilt error according to the formula:
e m=(g m-G m)-(g n-G n)x(C m/C n).
e m=(g m-G m)-(g n-G n)x(C m/C n).
28. A method as claimed in claim 25, wherein said step of providing an expected performance parameter comprises:
establishing by calibrated measurement an expected gain G m for each transmission channel (m) and determining an expected gain G0 using the least square best fit method;
measuring a gain tilt coefficient C m defining the expected relative change in said expected gain G m; and storing said expected gains and said gain tilt coefficients for all transmission channels in a memory unit.
establishing by calibrated measurement an expected gain G m for each transmission channel (m) and determining an expected gain G0 using the least square best fit method;
measuring a gain tilt coefficient C m defining the expected relative change in said expected gain G m; and storing said expected gains and said gain tilt coefficients for all transmission channels in a memory unit.
29. A method as claimed in claim 28, wherein said step of measuring further comprises:
determining a performance gain g0 using the least square best fit method; and calculating said gain tilt error according to the formula:
e m=(g m-G m)-(g0-G0)xC m.
determining a performance gain g0 using the least square best fit method; and calculating said gain tilt error according to the formula:
e m=(g m-G m)-(g0-G0)xC m.
30. A method as claimed in claim 16, wherein said performance parameter is a dynamic range value and said expected performance parameter is an expected dynamic range value.
31. A method as claimed in claim 30, wherein said step of providing said performance parameter comprises:
configuring a 2(M-1) dimension table, where a first dimension (P m) represents a provisioned output value, a second dimension (T m) represents a threshold, and a record (I1Max, I1Min) represents a range for said input value for a transmission channel (1) and (m) represents a transmission channel m~ [2,M); and storing said table in a memory unit.
configuring a 2(M-1) dimension table, where a first dimension (P m) represents a provisioned output value, a second dimension (T m) represents a threshold, and a record (I1Max, I1Min) represents a range for said input value for a transmission channel (1) and (m) represents a transmission channel m~ [2,M); and storing said table in a memory unit.
32. A method as claimed in claim 31, wherein said step of comparing comprises:
extracting from said memory unit said record corresponding to all said input values for transmission channels (n), where n~ [2,M); and also corresponding to all said output values for transmission channels (m), where m~ [1,M); and comparing said input value for said transmission channel (1) with said record.
extracting from said memory unit said record corresponding to all said input values for transmission channels (n), where n~ [2,M); and also corresponding to all said output values for transmission channels (m), where m~ [1,M); and comparing said input value for said transmission channel (1) with said record.
33. A method as claimed in claim 16, wherein said performance parameter is an output loss and said expected performance parameter is calibrated output loss.
34. A method as claimed in claim 33, wherein said step of measuring comprises:
establishing by calibrated measurement an expected gain G m and calculating a gain tilt coefficient C m defining the expected relative change in said expected gain G m for each transmission channel (m); and storing said gain tilt coefficients for all transmission channels in a memory unit.
establishing by calibrated measurement an expected gain G m and calculating a gain tilt coefficient C m defining the expected relative change in said expected gain G m for each transmission channel (m); and storing said gain tilt coefficients for all transmission channels in a memory unit.
35. A method as claimed in claim 34, wherein said step of measuring comprises:
determining a gain (g m) for a transmission channel (m) as a ratio between said output and said input values for all (M) transmission channels;
determining a pair of transmission channels (n,m) with the largest difference between said respective gain tilt coefficients; and calculating an expected additive ASE photon flux according to the formula:
FASE calc =(e A.INV2-1) .gamma.;
where and .alpha., .beta., A and .gamma. are constants are constants characterizing said amplifier module.
determining a gain (g m) for a transmission channel (m) as a ratio between said output and said input values for all (M) transmission channels;
determining a pair of transmission channels (n,m) with the largest difference between said respective gain tilt coefficients; and calculating an expected additive ASE photon flux according to the formula:
FASE calc =(e A.INV2-1) .gamma.;
where and .alpha., .beta., A and .gamma. are constants are constants characterizing said amplifier module.
36. A method as claimed in claim 35, wherein said step of measuring further comprises calculating said output loss error according to the formula:
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002172873A CA2172873C (en) | 1996-03-28 | 1996-03-28 | Method of determining optical amplifier failures |
EP97900522A EP0890229B1 (en) | 1996-03-28 | 1997-01-22 | Method of determining optical amplifier failures |
DE69720200T DE69720200T2 (en) | 1996-03-28 | 1997-01-22 | ERROR DETECTION METHOD FOR OPTICAL AMPLIFIERS |
JP53475897A JP3563410B2 (en) | 1996-03-28 | 1997-01-22 | How to determine optical amplifier failure. |
CNB971934290A CN100423476C (en) | 1996-03-28 | 1997-01-22 | Method of determining optical amplifier failures |
PCT/CA1997/000042 WO1997037444A1 (en) | 1996-03-28 | 1997-01-22 | Method of determining optical amplifier failures |
US08/788,300 US6064501A (en) | 1996-03-28 | 1997-01-24 | Method of determining optical amplifier failures |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CA002172873A CA2172873C (en) | 1996-03-28 | 1996-03-28 | Method of determining optical amplifier failures |
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CA2172873A1 CA2172873A1 (en) | 1997-09-29 |
CA2172873C true CA2172873C (en) | 2002-03-12 |
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CA002172873A Expired - Lifetime CA2172873C (en) | 1996-03-28 | 1996-03-28 | Method of determining optical amplifier failures |
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US (1) | US6064501A (en) |
EP (1) | EP0890229B1 (en) |
JP (1) | JP3563410B2 (en) |
CN (1) | CN100423476C (en) |
CA (1) | CA2172873C (en) |
DE (1) | DE69720200T2 (en) |
WO (1) | WO1997037444A1 (en) |
Families Citing this family (110)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10200489A (en) * | 1997-01-13 | 1998-07-31 | Nec Corp | Method, device for monitoring optical signal shield fault and optical network system |
JPH10327108A (en) * | 1997-05-23 | 1998-12-08 | Nec Corp | Nb-wdm system and wavelength number setting system for the nb-wdm system |
KR100219719B1 (en) * | 1997-07-15 | 1999-09-01 | 윤종용 | Control and supervising system on wavelength division multiplexed optical amplifier and method thereof |
US6211985B1 (en) * | 1997-08-08 | 2001-04-03 | Tyco Submarine Systems Ltd. | Remote monitoring of an optical transmission system using line monitoring signals |
US6603112B1 (en) | 1998-02-25 | 2003-08-05 | Massachusetts Institute Of Technology | Method and apparatus for detecting malfunctions in communication systems |
ES2138927B1 (en) * | 1998-02-27 | 2000-09-01 | Telefonica Sa | BIDIRECTIONAL MULTI-CHANNEL OPTICAL OPEN EXTENDER. |
US6222668B1 (en) * | 1998-05-08 | 2001-04-24 | Nortel Networks Limited | Fast loss of signal (LOS) detection for bidirectional optical amplifiers |
DE19926463B4 (en) * | 1998-06-23 | 2006-04-20 | Siemens Ag | Method for monitoring optical signals on a plurality of optical fibers |
US6545799B1 (en) | 1998-09-02 | 2003-04-08 | Corning Incorporated | Method and apparatus for optical system link control |
US6147796A (en) * | 1999-01-12 | 2000-11-14 | Tyco Submarine Systems Ltd. | Method for determining transmission parameters for the data channels of a WDM optical communication system |
US6246510B1 (en) * | 1999-04-28 | 2001-06-12 | Marconi Communications, Inc. | Light amplification apparatus with automatic monitoring and controls |
US6853654B2 (en) * | 1999-07-27 | 2005-02-08 | Intel Corporation | Tunable external cavity laser |
US6879619B1 (en) | 1999-07-27 | 2005-04-12 | Intel Corporation | Method and apparatus for filtering an optical beam |
US6856632B1 (en) * | 1999-09-20 | 2005-02-15 | Iolon, Inc. | Widely tunable laser |
US6847661B2 (en) * | 1999-09-20 | 2005-01-25 | Iolon, Inc. | Tunable laser with microactuator |
WO2001033750A1 (en) * | 1999-10-29 | 2001-05-10 | Fujitsu Limited | Optical transmission device and optical repeating device |
JP2001186107A (en) * | 1999-12-24 | 2001-07-06 | Fujitsu Ltd | Level adjustment method, and wavelength multiplex transmitter and system utilizing the method |
KR100326318B1 (en) * | 2000-02-09 | 2002-03-08 | 윤종용 | Suppression device for transient effect of optical fiber amplifier in wavelength division multiplexing system |
EP1130802A1 (en) * | 2000-03-02 | 2001-09-05 | Telefonaktiebolaget Lm Ericsson | Power stabilisation in an optical communication system |
EP1130819A1 (en) | 2000-03-03 | 2001-09-05 | Telefonaktiebolaget Lm Ericsson | Method and device for determining gain tilt in optical amplifiers with measurement of the total gain |
JP3544506B2 (en) * | 2000-03-24 | 2004-07-21 | 埼玉日本電気株式会社 | Automatic gain control device |
GB2360654A (en) * | 2000-03-25 | 2001-09-26 | Marconi Comm Ltd | Power controlling network element for adding new channels in a controlled manner |
WO2001080381A1 (en) * | 2000-04-13 | 2001-10-25 | Siemens Aktiengesellschaft | Method and device for regulating a medium with an amplifying effect, especially a fiber optical waveguide |
JP4234927B2 (en) | 2000-04-14 | 2009-03-04 | 富士通株式会社 | Optical wavelength division multiplexing transmission system, optical output control method, and optical wavelength division multiplexing transmission apparatus |
US7120176B2 (en) * | 2000-07-27 | 2006-10-10 | Intel Corporation | Wavelength reference apparatus and method |
US6466362B1 (en) * | 2000-08-31 | 2002-10-15 | Ciena Corporation | Hybrid amplifier and control method herefor that minimizes a noise figure for particular span loss |
JP3719119B2 (en) * | 2000-09-27 | 2005-11-24 | 日本電気株式会社 | Optical receiver |
US6473224B2 (en) * | 2000-12-01 | 2002-10-29 | Alcatel | Configurable safety shutdown for an optical amplifier using non-volatile storage |
US6522461B1 (en) | 2000-12-22 | 2003-02-18 | Ciena Corporation | Optical pre-amplifier apparatus and method for receiver performing gain control according to LOS declaration |
WO2002058283A2 (en) * | 2000-12-22 | 2002-07-25 | Ciena Corporation | Optical pre-amplifier apparatus and method for performing gain control |
US7149430B2 (en) * | 2001-02-05 | 2006-12-12 | Finsiar Corporation | Optoelectronic transceiver having dual access to onboard diagnostics |
US7079775B2 (en) * | 2001-02-05 | 2006-07-18 | Finisar Corporation | Integrated memory mapped controller circuit for fiber optics transceiver |
US7346278B2 (en) * | 2001-02-05 | 2008-03-18 | Finisar Corporation | Analog to digital signal conditioning in optoelectronic transceivers |
US6751413B2 (en) * | 2001-02-05 | 2004-06-15 | Agilent Technologies, Inc. | Channel mask definition for monitoring wavelength division multiplexing transmission systems |
US20040197101A1 (en) * | 2001-02-05 | 2004-10-07 | Sasser Gary D. | Optical transceiver module with host accessible on-board diagnostics |
US7302186B2 (en) | 2001-02-05 | 2007-11-27 | Finisar Corporation | Optical transceiver and host adapter with memory mapped monitoring circuitry |
CN100350683C (en) * | 2001-03-21 | 2007-11-21 | 英特尔公司 | Error signal generation system |
US6816516B2 (en) | 2001-03-21 | 2004-11-09 | Intel Corporation | Error signal generation system |
US6658031B2 (en) * | 2001-07-06 | 2003-12-02 | Intel Corporation | Laser apparatus with active thermal tuning of external cavity |
US6529316B1 (en) * | 2001-05-03 | 2003-03-04 | Onetta, Inc. | Optical network equipment with optical channel monitor and dynamic spectral filter alarms |
US6839523B1 (en) | 2001-05-11 | 2005-01-04 | Nortel Networks Limited | Monitoring distributed gain in an optical transmission system |
US6804278B2 (en) | 2001-07-06 | 2004-10-12 | Intel Corporation | Evaluation and adjustment of laser losses according to voltage across gain medium |
US6788724B2 (en) * | 2001-07-06 | 2004-09-07 | Intel Corporation | Hermetically sealed external cavity laser system and method |
US6901088B2 (en) * | 2001-07-06 | 2005-05-31 | Intel Corporation | External cavity laser apparatus with orthogonal tuning of laser wavelength and cavity optical pathlength |
US6822979B2 (en) | 2001-07-06 | 2004-11-23 | Intel Corporation | External cavity laser with continuous tuning of grid generator |
US6975642B2 (en) | 2001-09-17 | 2005-12-13 | Finisar Corporation | Optoelectronic device capable of participating in in-band traffic |
DE10146001B4 (en) * | 2001-09-18 | 2008-04-03 | Nokia Siemens Networks Gmbh & Co.Kg | Circuit arrangement and method for safety shutdown of an optical amplifier |
US6594071B1 (en) | 2001-10-02 | 2003-07-15 | Xtera Communications, Inc. | Method and apparatus for amplifier control |
US6760502B2 (en) * | 2001-12-04 | 2004-07-06 | Lucent Technologies Inc. | Power monitoring arrangement for optical cross-connect systems |
US6862302B2 (en) * | 2002-02-12 | 2005-03-01 | Finisar Corporation | Maintaining desirable performance of optical emitters over temperature variations |
US7230959B2 (en) * | 2002-02-22 | 2007-06-12 | Intel Corporation | Tunable laser with magnetically coupled filter |
US6798567B2 (en) * | 2002-03-07 | 2004-09-28 | Lucent Technologies Inc. | Method and apparatus for controlling power transients in an optical communication system |
US6825973B1 (en) * | 2002-03-15 | 2004-11-30 | Xtera Communications, Inc. | Reducing leading edge transients using co-propagating pumps |
US6721091B2 (en) | 2002-06-13 | 2004-04-13 | Tyco Telecommunications (Us) Inc. | System and method for controlling optical amplifier pumps |
US6763047B2 (en) * | 2002-06-15 | 2004-07-13 | Intel Corporation | External cavity laser apparatus and methods |
US6845121B2 (en) * | 2002-06-15 | 2005-01-18 | Intel Corporation | Optical isolator apparatus and methods |
US7486894B2 (en) * | 2002-06-25 | 2009-02-03 | Finisar Corporation | Transceiver module and integrated circuit with dual eye openers |
US7809275B2 (en) * | 2002-06-25 | 2010-10-05 | Finisar Corporation | XFP transceiver with 8.5G CDR bypass |
US7664401B2 (en) * | 2002-06-25 | 2010-02-16 | Finisar Corporation | Apparatus, system and methods for modifying operating characteristics of optoelectronic devices |
US7561855B2 (en) | 2002-06-25 | 2009-07-14 | Finisar Corporation | Transceiver module and integrated circuit with clock and data recovery clock diplexing |
US7437079B1 (en) | 2002-06-25 | 2008-10-14 | Finisar Corporation | Automatic selection of data rate for optoelectronic devices |
US7477847B2 (en) * | 2002-09-13 | 2009-01-13 | Finisar Corporation | Optical and electrical channel feedback in optical transceiver module |
US7230961B2 (en) | 2002-11-08 | 2007-06-12 | Finisar Corporation | Temperature and jitter compensation controller circuit and method for fiber optics device |
US7317743B2 (en) * | 2002-11-08 | 2008-01-08 | Finisar Corporation | Temperature and jitter compensation controller circuit and method for fiber optics device |
US7215891B1 (en) | 2003-06-06 | 2007-05-08 | Jds Uniphase Corporation | Integrated driving, receiving, controlling, and monitoring for optical transceivers |
CN100547423C (en) * | 2003-08-14 | 2009-10-07 | 皇家飞利浦电子股份有限公司 | Utilize the calibration of the tester and the test board of golden sample |
US7426586B2 (en) * | 2003-12-15 | 2008-09-16 | Finisar Corporation | Configurable input/output terminals |
JP4198082B2 (en) * | 2004-03-24 | 2008-12-17 | 富士通株式会社 | Optical amplifier gain monitoring method and apparatus |
US7711013B2 (en) * | 2004-03-31 | 2010-05-04 | Imra America, Inc. | Modular fiber-based chirped pulse amplification system |
US7630631B2 (en) * | 2004-04-14 | 2009-12-08 | Finisar Corporation | Out-of-band data communication between network transceivers |
US8639122B2 (en) * | 2004-07-02 | 2014-01-28 | Finisar Corporation | Filtering digital diagnostics information in an optical transceiver prior to reporting to host |
US7447438B2 (en) * | 2004-07-02 | 2008-11-04 | Finisar Corporation | Calibration of digital diagnostics information in an optical transceiver prior to reporting to host |
US7504610B2 (en) * | 2004-09-03 | 2009-03-17 | Mindspeed Technologies, Inc. | Optical modulation amplitude compensation system having a laser driver with modulation control signals |
DE102004047623B4 (en) * | 2004-09-30 | 2021-04-29 | Xieon Networks S.À.R.L. | Method for detecting aging effects and monitoring device for this |
DE102004047745A1 (en) * | 2004-09-30 | 2006-04-27 | Siemens Ag | Determination of amplified spontaneous emission in an optical fiber amplifier |
US7532820B2 (en) | 2004-10-29 | 2009-05-12 | Finisar Corporation | Systems and methods for providing diagnostic information using EDC transceivers |
DE102004052883B4 (en) * | 2004-11-02 | 2019-07-04 | Xieon Networks S.À.R.L. | Method for compensating for fluctuations in the gain of a multistage optical amplifier and multistage optical amplifier |
US7398431B2 (en) * | 2004-12-20 | 2008-07-08 | Emc Corporation | System and method of dynamically setting a fault threshold for an operational module |
IL181135A (en) * | 2007-02-01 | 2012-04-30 | Eci Telecom Ltd | Method, device and system for managing optical communication networks |
US8750341B2 (en) * | 2008-01-04 | 2014-06-10 | Mindspeed Technologies, Inc. | Method and apparatus for reducing optical signal speckle |
JP4645655B2 (en) * | 2008-02-04 | 2011-03-09 | 富士ゼロックス株式会社 | Optical transmission module |
CN102318338A (en) | 2008-03-31 | 2012-01-11 | 曼德斯必德技术公司 | Reducing power dissipation in portable LCOS/LCD/DLP projection systems |
US8159956B2 (en) * | 2008-07-01 | 2012-04-17 | Finisar Corporation | Diagnostics for serial communication busses |
EP2467959B1 (en) * | 2009-08-19 | 2019-10-09 | Telefonaktiebolaget LM Ericsson (publ) | Improvements in optical networks |
CN101937036A (en) * | 2010-08-24 | 2011-01-05 | 深圳市华曦达科技股份有限公司 | Electric appliance fault detection method, device and system |
US8643296B2 (en) | 2010-11-22 | 2014-02-04 | Mindspeed Technologies, Inc. | Color mixing and desaturation with reduced number of converters |
US8908751B2 (en) * | 2011-02-28 | 2014-12-09 | Intel Mobile Communications GmbH | Joint adaptive bias point adjustment and digital pre-distortion for power amplifier |
US9107245B2 (en) | 2011-06-09 | 2015-08-11 | Mindspeed Technologies, Inc. | High accuracy, high dynamic range LED/laser driver |
JP6010897B2 (en) * | 2011-11-15 | 2016-10-19 | 富士通株式会社 | Optical amplification device and optical transmission system |
JP6031870B2 (en) * | 2012-07-24 | 2016-11-24 | 富士通株式会社 | Optical amplifier and optical signal abnormality detection method |
US9385606B2 (en) | 2012-12-03 | 2016-07-05 | M/A-Com Technology Solutions Holdings, Inc. | Automatic buck/boost mode selection system for DC-DC converter |
JP6083220B2 (en) | 2012-12-06 | 2017-02-22 | 富士通株式会社 | Optical amplifier and failure detection method |
CN103023574A (en) * | 2012-12-21 | 2013-04-03 | 天津光拓科技有限公司 | Multifunctional optical fiber amplifier control system |
US9002201B2 (en) * | 2013-01-03 | 2015-04-07 | International Business Machines Corporation | Apparatus for testing an optical network |
US9270368B2 (en) | 2013-03-14 | 2016-02-23 | Hubbell Incorporated | Methods and apparatuses for improved Ethernet path selection using optical levels |
US10097908B2 (en) | 2014-12-31 | 2018-10-09 | Macom Technology Solutions Holdings, Inc. | DC-coupled laser driver with AC-coupled termination element |
CN110073614B (en) | 2016-08-30 | 2022-03-04 | Macom技术解决方案控股公司 | Driver with distributed architecture |
US10142022B1 (en) | 2017-05-24 | 2018-11-27 | Ciena Corporation | Adjustment of control parameters of section of optical fiber network |
US10439751B2 (en) | 2017-05-24 | 2019-10-08 | Ciena Corporation | Power control in an optical fiber network |
WO2018215850A1 (en) | 2017-05-24 | 2018-11-29 | Ciena Corporation | Adjustment of control parameters of section of optical fiber network and power control in an optical fiber network |
US10630052B2 (en) | 2017-10-04 | 2020-04-21 | Macom Technology Solutions Holdings, Inc. | Efficiency improved driver for laser diode in optical communication |
US10784955B2 (en) * | 2018-11-13 | 2020-09-22 | Infinera Corporation | Method and apparatus for rapid recovery of optical power after transient events in C+L band optical networks |
US11005573B2 (en) | 2018-11-20 | 2021-05-11 | Macom Technology Solutions Holdings, Inc. | Optic signal receiver with dynamic control |
TW202143665A (en) | 2020-01-10 | 2021-11-16 | 美商Macom技術方案控股公司 | Optimal equalization partitioning |
US11575437B2 (en) | 2020-01-10 | 2023-02-07 | Macom Technology Solutions Holdings, Inc. | Optimal equalization partitioning |
US11411365B2 (en) | 2020-01-17 | 2022-08-09 | Ciena Corporation | System-level optical amplifier efficiency performance metric |
EP4176536A1 (en) | 2020-07-02 | 2023-05-10 | Ciena Corporation | Utilizing an incremental noise metric for rapid modeling of optical networks |
US11658630B2 (en) | 2020-12-04 | 2023-05-23 | Macom Technology Solutions Holdings, Inc. | Single servo loop controlling an automatic gain control and current sourcing mechanism |
US11616529B2 (en) | 2021-02-12 | 2023-03-28 | Macom Technology Solutions Holdings, Inc. | Adaptive cable equalizer |
US20240089007A1 (en) * | 2022-09-12 | 2024-03-14 | Fujitsu Limited | Mitigation of anomaly loss in an optical transmission system |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2649737B2 (en) * | 1990-07-05 | 1997-09-03 | 国際電信電話株式会社 | Pumping light source drive method for optical amplifier |
JP2648643B2 (en) * | 1991-06-03 | 1997-09-03 | 日本電信電話株式会社 | Optical amplifier |
JP2661438B2 (en) * | 1991-09-24 | 1997-10-08 | 日本電気株式会社 | Optical regeneration repeater |
EP0541061B1 (en) * | 1991-11-08 | 1997-07-02 | Mitsubishi Denki Kabushiki Kaisha | Optical-fiber light amplifier |
US5455704A (en) * | 1991-11-08 | 1995-10-03 | Mitsubishi Denki Kabushiki Kaisha | Optical-fiber light amplifier |
JP3320452B2 (en) * | 1992-07-15 | 2002-09-03 | 沖電気工業株式会社 | Monitoring and control method for optical repeaters |
FR2703531B1 (en) * | 1993-03-30 | 1995-05-19 | Cit Alcatel | Device for evaluating the transmission quality of an optical amplifier equipment. |
US5374973A (en) * | 1993-09-21 | 1994-12-20 | Alcatel Network Systems, Inc. | Optical amplifier |
CA2155693C (en) * | 1994-08-25 | 1999-12-14 | Daniel A. Fishman | Performance monitoring and fault location in optical transmission systems |
JP2687933B2 (en) * | 1995-06-09 | 1997-12-08 | 日本電気株式会社 | Optical direct amplifier |
-
1996
- 1996-03-28 CA CA002172873A patent/CA2172873C/en not_active Expired - Lifetime
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1997
- 1997-01-22 DE DE69720200T patent/DE69720200T2/en not_active Expired - Fee Related
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JP3563410B2 (en) | 2004-09-08 |
JPH11507189A (en) | 1999-06-22 |
WO1997037444A1 (en) | 1997-10-09 |
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EP0890229B1 (en) | 2003-03-26 |
CN100423476C (en) | 2008-10-01 |
DE69720200D1 (en) | 2003-04-30 |
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