CA2119045A1 - Optical Waveguiding Component Comprising a Band-Pass Filter - Google Patents

Optical Waveguiding Component Comprising a Band-Pass Filter

Info

Publication number
CA2119045A1
CA2119045A1 CA2119045A CA2119045A CA2119045A1 CA 2119045 A1 CA2119045 A1 CA 2119045A1 CA 2119045 A CA2119045 A CA 2119045A CA 2119045 A CA2119045 A CA 2119045A CA 2119045 A1 CA2119045 A1 CA 2119045A1
Authority
CA
Canada
Prior art keywords
band
pass filter
optical waveguiding
transmissivity
filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2119045A
Other languages
French (fr)
Other versions
CA2119045C (en
Inventor
Victor Mizrahi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Priority to CA002277665A priority Critical patent/CA2277665C/en
Publication of CA2119045A1 publication Critical patent/CA2119045A1/en
Application granted granted Critical
Publication of CA2119045C publication Critical patent/CA2119045C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
    • G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
    • G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
    • G02B6/02085—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response characterised by the grating profile, e.g. chirped, apodised, tilted, helical
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
    • G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
    • G02B6/29317—Light guides of the optical fibre type
    • G02B6/29319—With a cascade of diffractive elements or of diffraction operations
    • G02B6/2932—With a cascade of diffractive elements or of diffraction operations comprising a directional router, e.g. directional coupler, circulator
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
    • G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM

Abstract

An optical filter is adapted for selectively transmitting electromagnetic radiation within a wavelength passband bounded by a pair of stop bands of relatively low transmissivity. The filter includes at least one Bragg grating formed in a waveguiding optical medium. The Bragg grating has at least one wavelength band of relatively low transmissivity. This low-transmissivity band corresponds to at least a portion of one of the stop bands of the filter.
CA002119045A 1993-06-17 1994-03-15 Optical waveguiding component comprising a band-pass filter Expired - Fee Related CA2119045C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002277665A CA2277665C (en) 1993-06-17 1994-03-15 Optical waveguiding component comprising a band-pass filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/078,992 US5475780A (en) 1993-06-17 1993-06-17 Optical waveguiding component comprising a band-pass filter
US078,992 1993-06-17

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA002277665A Division CA2277665C (en) 1993-06-17 1994-03-15 Optical waveguiding component comprising a band-pass filter

Publications (2)

Publication Number Publication Date
CA2119045A1 true CA2119045A1 (en) 1994-12-18
CA2119045C CA2119045C (en) 1999-11-16

Family

ID=22147440

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002119045A Expired - Fee Related CA2119045C (en) 1993-06-17 1994-03-15 Optical waveguiding component comprising a band-pass filter

Country Status (4)

Country Link
US (2) US5475780A (en)
EP (1) EP0629885A1 (en)
JP (1) JP3243123B2 (en)
CA (1) CA2119045C (en)

Families Citing this family (83)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5825520A (en) * 1992-07-27 1998-10-20 Huber; David R. Optical demultiplexers with grating reflectors
US5457760A (en) * 1994-05-06 1995-10-10 At&T Ipm Corp. Wavelength division optical multiplexing elements
US5548671A (en) * 1994-10-13 1996-08-20 Northern Telecom Limited Programmable, differential wavelength discriminator
FR2728975A1 (en) * 1994-12-28 1996-07-05 Alcatel Submarcom FILTER FOR GUIDED LIGHT AND OPTICAL LINK INCLUDING THIS FILTER
GB2302443B (en) * 1995-06-21 1999-03-17 Northern Telecom Ltd Lasers
IT1277397B1 (en) * 1995-07-31 1997-11-10 Pirelli Cavi S P A Ora Pirelli WAVE LENGTH MULTIPLATION TELECOMMUNICATION SYSTEM AND METHOD WITH CONTROLLED OUTPUT CHANNEL SEPARATION
US5703978A (en) * 1995-10-04 1997-12-30 Lucent Technologies Inc. Temperature insensitive long-period fiber grating devices
JP3497298B2 (en) * 1995-10-23 2004-02-16 株式会社フジクラ Optical fiber filter
JP3534550B2 (en) * 1995-11-01 2004-06-07 住友電気工業株式会社 OTDR device
US5943152A (en) * 1996-02-23 1999-08-24 Ciena Corporation Laser wavelength control device
US5673129A (en) * 1996-02-23 1997-09-30 Ciena Corporation WDM optical communication systems with wavelength stabilized optical selectors
US6111681A (en) 1996-02-23 2000-08-29 Ciena Corporation WDM optical communication systems with wavelength-stabilized optical selectors
US5724377A (en) * 1996-02-29 1998-03-03 Lucent Technologies Inc. Method and apparatus for improving the instability of a laser
US5982518A (en) * 1996-03-27 1999-11-09 Ciena Corporation Optical add-drop multiplexers compatible with very dense WDM optical communication systems
US5748349A (en) * 1996-03-27 1998-05-05 Ciena Corp. Gratings-based optical add-drop multiplexers for WDM optical communication system
US5673342A (en) * 1996-05-28 1997-09-30 Lucent Technologies Inc. Communication system comprising a low cost optical filter
US5971629A (en) 1996-07-12 1999-10-26 Bloom; Cary Apparatus and method bonding optical fiber and/or device to external element using compliant material interface
US5815619A (en) * 1996-12-10 1998-09-29 Bloom; Cary Fiber optic connector hermetically terminated
US5871559A (en) * 1996-12-10 1999-02-16 Bloom; Cary Arrangement for automated fabrication of fiber optic devices
US5680495A (en) * 1996-07-12 1997-10-21 Bloom; Cary Fiber optic device sealed by compressed metal seals and method for making the same
US6000858A (en) * 1996-07-12 1999-12-14 Bloom; Cary Apparatus for, and method of, forming a low stress tight fit of an optical fiber to an external element
US5805757A (en) * 1996-12-10 1998-09-08 Bloom; Cary Apparatus and method for preserving optical characteristics of a fiber optic device
FR2752950B1 (en) * 1996-09-02 1998-10-09 Alsthom Cge Alcatel BANDPASS FILTER INSERTED IN AN OPTICAL WAVEGUIDE
US5931983A (en) * 1996-09-24 1999-08-03 Bloom; Cary Method of forming a fiber optic coupler by dynamically adjusting pulling speed
US6177985B1 (en) 1996-10-01 2001-01-23 Cary Bloom Apparatus and method for testing optical fiber system components
US5764348A (en) * 1996-10-01 1998-06-09 Bloom; Cary Optical switching assembly for testing fiber optic devices
US5778118A (en) * 1996-12-03 1998-07-07 Ciena Corporation Optical add-drop multiplexers for WDM optical communication systems
US6003341A (en) * 1996-12-10 1999-12-21 Bloom; Cary Device for making fiber couplers automatically
US6074101A (en) * 1996-12-10 2000-06-13 Bloom; Cary Apparatus for, and method of, forming a low stress tight fit of an optical fiber to an external element
US5917975A (en) * 1996-12-10 1999-06-29 Bloom; Cary Apparatus for, and method of, forming a low stress tight fit of an optical fiber to an external element
CA2195153C (en) * 1997-01-15 2003-12-30 Dennis K. W. Lam Surveillance system for passive branched optical networks
JP4063908B2 (en) * 1997-01-29 2008-03-19 富士通株式会社 Light source device, optical amplifier, and optical communication system
EP0875776A3 (en) * 1997-04-29 2000-08-16 Lucent Technologies Inc. Optical multiplexer having flat passbands
US6631018B1 (en) 1997-08-27 2003-10-07 Nortel Networks Limited WDM optical network with passive pass-through at each node
US6281997B1 (en) * 1997-09-11 2001-08-28 Ciena Corporation Dense WDM optical multiplexer and demultiplexer
JP3930952B2 (en) * 1997-10-20 2007-06-13 富士通株式会社 Optical cross-connect device, optical add / drop device, and light source device
US6005999A (en) * 1997-11-21 1999-12-21 3M Innovative Properties Company Waveguide narrowband rejection filter
CA2228683C (en) * 1998-02-20 2002-05-14 Ivan Avrutsky Superimposed grating wdm tunable lasers
US20010024542A1 (en) * 1998-06-09 2001-09-27 Stefano Aina Method and device for dropping optical channels in an optical transmission system
US7130540B2 (en) * 1998-07-21 2006-10-31 Corvis Corporation Optical transmission systems, devices, and methods
US6449073B1 (en) 1998-07-21 2002-09-10 Corvis Corporation Optical communication system
US6538783B1 (en) * 1998-09-18 2003-03-25 Corvis Corporation Optical systems including add drop devices and methods
AUPP617198A0 (en) 1998-09-25 1998-10-22 University Of Sydney, The High q optical microwave processor using hybrid delay-line filters
IES990137A2 (en) * 1999-02-22 2000-08-23 Sumicem Opto Electronics Irela High isolation couplers
US6771905B1 (en) * 1999-06-07 2004-08-03 Corvis Corporation Optical transmission systems including optical switching devices, control apparatuses, and methods
US8111401B2 (en) 1999-11-05 2012-02-07 Robert Magnusson Guided-mode resonance sensors employing angular, spectral, modal, and polarization diversity for high-precision sensing in compact formats
US7167615B1 (en) 1999-11-05 2007-01-23 Board Of Regents, The University Of Texas System Resonant waveguide-grating filters and sensors and methods for making and using same
US7615339B2 (en) 2000-10-30 2009-11-10 Sru Biosystems, Inc. Method for producing a colorimetric resonant reflection biosensor on rigid surfaces
US7175980B2 (en) 2000-10-30 2007-02-13 Sru Biosystems, Inc. Method of making a plastic colorimetric resonant biosensor device with liquid handling capabilities
US7875434B2 (en) 2000-10-30 2011-01-25 Sru Biosystems, Inc. Label-free methods for performing assays using a colorimetric resonant reflectance optical biosensor
US7070987B2 (en) * 2000-10-30 2006-07-04 Sru Biosystems, Inc. Guided mode resonant filter biosensor using a linear grating surface structure
US7300803B2 (en) 2000-10-30 2007-11-27 Sru Biosystems, Inc. Label-free methods for performing assays using a colorimetric resonant reflectance optical biosensor
US7153702B2 (en) 2000-10-30 2006-12-26 Sru Biosystems, Inc. Label-free methods for performing assays using a colorimetric resonant reflectance optical biosensor
US7023544B2 (en) 2000-10-30 2006-04-04 Sru Biosystems, Inc. Method and instrument for detecting biomolecular interactions
US7306827B2 (en) 2000-10-30 2007-12-11 Sru Biosystems, Inc. Method and machine for replicating holographic gratings on a substrate
US7217574B2 (en) 2000-10-30 2007-05-15 Sru Biosystems, Inc. Method and apparatus for biosensor spectral shift detection
US6951715B2 (en) * 2000-10-30 2005-10-04 Sru Biosystems, Inc. Optical detection of label-free biomolecular interactions using microreplicated plastic sensor elements
US7101660B2 (en) 2000-10-30 2006-09-05 Sru Biosystems, Inc. Method for producing a colorimetric resonant reflection biosensor on rigid surfaces
US7264973B2 (en) 2000-10-30 2007-09-04 Sru Biosystems, Inc. Label-free methods for performing assays using a colorimetric resonant optical biosensor
US7575939B2 (en) * 2000-10-30 2009-08-18 Sru Biosystems, Inc. Optical detection of label-free biomolecular interactions using microreplicated plastic sensor elements
US7371562B2 (en) 2000-10-30 2008-05-13 Sru Biosystems, Inc. Guided mode resonant filter biosensor using a linear grating surface structure
US7202076B2 (en) 2000-10-30 2007-04-10 Sru Biosystems, Inc. Label-free high-throughput optical technique for detecting biomolecular interactions
US7118710B2 (en) * 2000-10-30 2006-10-10 Sru Biosystems, Inc. Label-free high-throughput optical technique for detecting biomolecular interactions
US7142296B2 (en) 2000-10-30 2006-11-28 Sru Biosystems, Inc. Method and apparatus for detecting biomolecular interactions
US20020118439A1 (en) * 2000-11-16 2002-08-29 Lightbit Corporation Optical frequency synthesizing structure
US6603909B2 (en) 2000-11-21 2003-08-05 3M Innovative Properties Company Laser pigtail fiber with inherent attenuation characteristic
US6636675B2 (en) 2001-03-12 2003-10-21 Verrillon, Inc. Optical fiber with reduced cladding-mode loss
US6950576B1 (en) * 2001-03-29 2005-09-27 Sabeus Photonics, Inc. Mode coupling devices with complex spectral profile
KR100454954B1 (en) * 2001-12-05 2004-11-06 삼성전자주식회사 Amplitude mask and demultiplexer applied long-period optical fiber gratings fabricated by the same
JP2003307657A (en) * 2002-04-15 2003-10-31 Mitsubishi Cable Ind Ltd Fiber for high-output pulse light and optical amplifier
US6922529B2 (en) * 2002-08-09 2005-07-26 Corvis Corporation Optical communications systems, devices, and methods
US7429492B2 (en) 2002-09-09 2008-09-30 Sru Biosystems, Inc. Multiwell plates with integrated biosensors and membranes
US7927822B2 (en) 2002-09-09 2011-04-19 Sru Biosystems, Inc. Methods for screening cells and antibodies
US6888981B2 (en) * 2002-09-13 2005-05-03 Honeywell International Inc. Wavelength division multiplexing coupler with loss element
US7309614B1 (en) 2002-12-04 2007-12-18 Sru Biosystems, Inc. Self-referencing biodetection method and patterned bioassays
KR100492979B1 (en) * 2003-01-02 2005-06-07 삼성전자주식회사 Apparatus of Transmission Adapting Band-Stop Filter
US8298780B2 (en) 2003-09-22 2012-10-30 X-Body, Inc. Methods of detection of changes in cells
US7095925B2 (en) * 2004-11-03 2006-08-22 Intel Corporation Optical phased array transmitter/receiver
US9134307B2 (en) 2007-07-11 2015-09-15 X-Body, Inc. Method for determining ion channel modulating properties of a test reagent
AU2008274978A1 (en) 2007-07-11 2009-01-15 Sru Biosystems, Inc. Methods of identifying modulators of ion channels
US8257936B2 (en) 2008-04-09 2012-09-04 X-Body Inc. High resolution label free analysis of cellular properties
WO2015055864A1 (en) * 2013-10-18 2015-04-23 Telefónica, S.A. Method, system and device for the supervision of optical fibres
US10101630B2 (en) * 2016-04-28 2018-10-16 Analog Photonic Llc Optical waveguide device

Family Cites Families (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3037712A1 (en) * 1980-10-06 1982-05-13 Siemens AG, 1000 Berlin und 8000 München OPTICAL WAVELENGTH MULTIPLEX SYSTEM
JPS57190908A (en) * 1981-05-20 1982-11-24 Toshiba Corp Optical filter
CA1211868A (en) * 1982-04-16 1986-09-23 Yoshikazu Nishiwaki Method of forming diffraction gratings and optical branching filter elements produced thereby
US4773063A (en) * 1984-11-13 1988-09-20 University Of Delaware Optical wavelength division multiplexing/demultiplexing system
US4726011A (en) * 1985-04-08 1988-02-16 Itt Defense Communications, A Division Of Itt Corporation Coherent optical fiber communication with frequency-division-multiplexing
US4901306A (en) * 1987-02-24 1990-02-13 American Telephone And Telegraph Company, At&T Bell Laboratories Wavelength-division multiplexed optical fiber network
US4852960A (en) * 1987-03-11 1989-08-01 American Telephone And Telegraph Company, At&T Bell Laboratories Narrow-linewidth resonant optical device, transmitter, system, and method
US4926412A (en) * 1988-02-22 1990-05-15 Physical Optics Corporation High channel density wavelength division multiplexer with defined diffracting means positioning
JPH02143203A (en) * 1988-11-25 1990-06-01 Ricoh Co Ltd Optical multiplexer/demultiplexer element
DE3904752A1 (en) * 1989-02-16 1990-08-23 Siemens Ag DEVICE FOR THE OPTICAL DIRECT RECEPTION OF SEVERAL WAVELENGTHS
US4923271A (en) * 1989-03-28 1990-05-08 American Telephone And Telegraph Company Optical multiplexer/demultiplexer using focusing Bragg reflectors
US5077816A (en) * 1989-12-26 1991-12-31 United Technologies Corporation Fiber embedded grating frequency standard optical communication devices
US5042897A (en) * 1989-12-26 1991-08-27 United Technologies Corporation Optical waveguide embedded light redirecting Bragg grating arrangement
US5048913A (en) * 1989-12-26 1991-09-17 United Technologies Corporation Optical waveguide embedded transverse spatial mode discrimination filter
US5212577A (en) * 1990-01-19 1993-05-18 Canon Kabushiki Kaisha Optical communication equipment and optical communication method
US5063559A (en) * 1990-02-28 1991-11-05 At&T Bell Laboratories Optimized wavelength-division-multiplexed lightwave communication system
US5048909A (en) * 1990-07-27 1991-09-17 At&T Bell Laboratories Adiabatic reflection apparatus
US5093876A (en) * 1990-07-27 1992-03-03 At&T Bell Laboratories WDM systems incorporating adiabatic reflection filters
US5226100A (en) * 1990-09-21 1993-07-06 Siemens Aktiengesellschaft Optical grating comprising a plurality of side-by-side outfeed end faces of optical waveguides
US5157747A (en) * 1991-01-18 1992-10-20 At&T Bell Laboratories Photorefractive optical fiber
US5206920A (en) * 1991-02-01 1993-04-27 Siemens Aktiengesellschaft Integrated optical arrangement for demultiplexing a plurality of different wavelength channels and the method of manufacture
KR940003669B1 (en) * 1991-03-27 1994-04-25 주식회사 금성사 Tape recording system of vcr
US5136671A (en) * 1991-08-21 1992-08-04 At&T Bell Laboratories Optical switch, multiplexer, and demultiplexer
US5195161A (en) * 1991-12-11 1993-03-16 At&T Bell Laboratories Optical waveguide comprising Bragg grating coupling means
DE4142922A1 (en) * 1991-12-24 1993-07-01 Bosch Gmbh Robert COMPONENT FOR USE IN TRANSMITTING OPTICAL SIGNALS
EP0568236B1 (en) * 1992-04-29 1999-06-16 AT&T Corp. Efficient reflective optical multiplexers and demultiplexers
US5235659A (en) * 1992-05-05 1993-08-10 At&T Bell Laboratories Method of making an article comprising an optical waveguide
US5287427A (en) * 1992-05-05 1994-02-15 At&T Bell Laboratories Method of making an article comprising an optical component, and article comprising the component
US5237576A (en) * 1992-05-05 1993-08-17 At&T Bell Laboratories Article comprising an optical fiber laser
US5337382A (en) * 1992-05-29 1994-08-09 At&T Bell Laboratories Article comprising an optical waveguide with in-line refractive index grating
US5218655A (en) * 1992-05-29 1993-06-08 At&T Bell Laboratories Article comprising an optical waveguide with in-line refractive index grating
US5271024A (en) * 1992-07-27 1993-12-14 General Instrument Corporation Optical fiber amplifier and laser with flattened gain slope
US5283686A (en) * 1992-07-27 1994-02-01 General Instrument Corporation, Jerrold Communications Optical systems with grating reflector
US5309260A (en) * 1992-12-23 1994-05-03 At&T Bell Laboratories Method for forming distributed bragg reflectors in optical media
US5327515A (en) * 1993-01-14 1994-07-05 At&T Laboratories Method for forming a Bragg grating in an optical medium
US5400422A (en) * 1993-01-21 1995-03-21 The United States Of America As Represented By The Secretary Of The Navy Technique to prepare high-reflectance optical fiber bragg gratings with single exposure in-line or fiber draw tower
US5373516A (en) * 1993-02-19 1994-12-13 At&T Corp. Rapidly tunable wideband integrated laser
US5351324A (en) * 1993-09-10 1994-09-27 The Regents Of The University Of California, Office Of Technology Transfer Fiber optic security seal including plural Bragg gratings
US5426297A (en) * 1993-09-27 1995-06-20 United Technologies Corporation Multiplexed Bragg grating sensors
US5323404A (en) * 1993-11-02 1994-06-21 At&T Bell Laboratories Optical fiber laser or amplifier including high reflectivity gratings
US5457760A (en) * 1994-05-06 1995-10-10 At&T Ipm Corp. Wavelength division optical multiplexing elements

Also Published As

Publication number Publication date
CA2119045C (en) 1999-11-16
JPH07104124A (en) 1995-04-21
JP3243123B2 (en) 2002-01-07
US5475780A (en) 1995-12-12
EP0629885A1 (en) 1994-12-21
US5570440A (en) 1996-10-29

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