CN1307416A - 在光信道监视模块中的用于设置标准波长的装置 - Google Patents

在光信道监视模块中的用于设置标准波长的装置 Download PDF

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CN1307416A
CN1307416A CN01103206A CN01103206A CN1307416A CN 1307416 A CN1307416 A CN 1307416A CN 01103206 A CN01103206 A CN 01103206A CN 01103206 A CN01103206 A CN 01103206A CN 1307416 A CN1307416 A CN 1307416A
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light
wave length
signal
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emitting device
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CN1166103C (zh
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申根浩
吴润济
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Samsung Electronics Co Ltd
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/28Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293Optical 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
    • G02B6/29304Optical 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
    • G02B6/29316Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
    • G02B6/29317Light guides of the optical fibre type
    • G02B6/29319With a cascade of diffractive elements or of diffraction operations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/28Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293Optical 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
    • G02B6/29379Optical 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
    • G02B6/2938Optical 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
    • G02B6/29382Optical 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 including at least adding or dropping a signal, i.e. passing the majority of signals
    • G02B6/29385Channel monitoring, e.g. by tapping
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25Arrangements specific to fibre transmission
    • H04B10/2581Multimode transmission

Abstract

一种在具有可变滤波器的光信道监视模块中的标准波长设定装置。包括:标准波长供给器,具有当接收到驱动电压时输出宽带光的发光装置、当接收到发射接通信号时将驱动电压接入该发光装置的发光装置驱动器、在从发光装置接收的宽带光中只反射标准波长的光的光纤光栅、和将从发光装置接收的宽带光供给光纤光栅并输出由该光纤光栅反射的标准波长的光;光耦合器,将从标准波长供给器接收的标准波长的光输给可变滤波器;控制器,将发射接通信号输给发光装置驱动器以监视输入光信号。

Description

在光信道监视模块中的用于设置标准波长的装置
本发明一般涉及光通信系统,特别涉及在WDM(波分复用)光通信系统中的光信道监视模块。
光信道监视模块监视在WDM光网络中的光信号的传输状态。该光信道监视模块,通过监视所有信道的光信号的强度,复用光信号的强度,在多路分解之前光信号的强度,和这些信道的多路分解光信号的强度,来提供对维修光通信系统有用的信息。
对于光信号监视采用了各种光学分解方法。在它们之中,广泛采用了使用波长可变滤波器的光信号监视。在这种方法中,引入一个预置的标准波长来补偿传输波长的不稳定性,并且在监视光信号中的该标准波长得到精确的波长。
采用具有稳定波长的光源对于利用标准波长的光信道监视方法的应用是非常重要的。将有源器件,激光二极管的输出用作为标准波长。这种通常方法的实施需要诸如用于稳定该激光二极管的输出波长的稳定电路等的附加设备,从而施加了经济上的约束。
在光纤放大器中使用由光纤光栅滤波的ASE(放大自发辐射)光的谷点位置作为标准波长的另一通常方法,当输入ASE光的强度低且在无光纤放大器的系统里,在检测光电二极管的标准波长中是无效的。
因此,本发明的一个目的是提供一种廉价的标准波长设定装置,并提供在光信道监视模块中的信道监视所需的稳定标准波长。
本发明的另一目的是提供一种标准波长设定装置,以便在光信道监视模块中提供稳定的标准波长,而无需使用光纤放大器的ASE光。
为了达到上述目的,在具有可变滤波器的光信道监视模块中提供一种标准波长设定装置。在该标准波长设定装置中,一个标准波长供给器具有:一个发光装置,用于根据接收的驱动电压输出宽带光;一个发光装置驱动器,当接收到发射接通(emission-on)信号时用于将该驱动电压接入到该发光装置;光纤光栅,用于只反射从该发光装置接收的宽带光中的标准波长的光;和一个光分配器,用将从该发光装置接收的宽带光送给该光纤光栅,并输出由该光纤光栅反射的标准波长的光。一个光耦合器,将从标准波长供给器接收的标准波长的光输出给该可变滤波器。一个控制器,将发射接通信号输出给该发光装置驱动器,以监视输入光信号。
从下面结合附图的详细描述中,本发明的上述和其它目的、特征和优点将变得更加明显。
图1是具有根据本发明的最佳实施例的标准波长设定装置的光信道监视模块的框图。
下面将参考附图描述本发明的最佳实施例。在下面的描述中,没有详细地描述众所周知的功能和结构,因为它们将以不必要的细节模糊本发明。
参照图1,具有根据本发明实施例的标准波长设定装置的光信道监视模块900包括一个标准波长供给器100、一个光耦合器200、一个可变滤波器300、一个可变滤波器驱动器400、一个数-模转换器(DAC)500、一个光电二极管600、一个模-数转换器(ADC)700、和一个控制器800。
该标准波长供给器100由发光装置模块110、光纤光栅118、和光分配器116组成。
该发光装置模块110包括:发光装置112,当接收到驱动电压时输出宽带的光;和发光装置驱动器114,根据输入发射接通信号,将该驱动电压接入发光装置112。该发光装置112采用1550nm的宽带光源。
该光纤光栅118只反射输入宽带光中的标准波长的光。该光纤光栅118是反射满足布拉格(Bragg)条件的波长的光的光纤布拉格光栅。该标准波长是相对于加到WDM系统带宽的短波长和长波长。在16个信道WDM系统的情况下,例如,它的带宽范围为1545.32-1557.36nm,因此可将比最短的波长短了大约4nm的1540nm和比最长的波长长了大约5nm的1562nm设置为该标准波长。将一个角度物理(APC)光纤用在该光纤光栅118的终端以避免光反射。
光分配器116将输入宽带光送给光纤光栅118,并将从光纤光栅118反射的标准波长的光送给光耦合器200。
光耦合器200使从光分配器116接收的标准波长的光信号与由分光器10所分的光信号耦合。
可变滤波器300根据从光耦合器200接收的光信号中的接收驱动电压,滤出预定波长的光信号和标准波长的光信号。该可变滤波器300是一个Febry-Perote可变滤波器。
可变滤波器驱动器400根据接收的滤波器控制信号将该驱动电压供给可变滤波器300。光电二极管600将从该可变滤波器300接收的差错光信号转换为电信号。
控制器800输出用于提供标准波长的发射接通信号和用于监视预定光信号的滤波器控制信号,并监视从光电二极管600接收的电信号中的对应光信号。控制器800还具有:一个暂时存储器810,用于暂时存储在光通信系统之间交换的光信号信息;和一个串行通信装置,用于启动在外部终端之间的光信号信息的交换。
如上所述,根据本发明实施例的在光信道监视模块中的标准波长设定装置,因为将廉价而又稳定的发光装置模块用作为宽带光源,故比起激光二极管更为经济和稳定。
另外,该发光装置模块提供稳定的标准波长,使该标准波长设定装置可应用到没有光纤放大器的光通信系统。
尽管参考它的一定的最佳实施例表示和描述了本发明,但在本领域的技术人员应理解,在不脱离由所附权利要求书限定的本发明的精神和范围内在形式和具体细节上可作出各种变化。

Claims (6)

1.在具有可变滤波器的光信道监视模块中的标准波长设定装置,包括:
标准波长供给器,具有:发光装置,根据接收的驱动电压输出宽带光;发光装置驱动器,当接收到发射接通信号时将该驱动电压接入该发光装置;光纤光栅,用于只反射从该发光装置接收的宽带光中的标准波长的光;和光分配器,用于将从该发光装置接收的宽带光供给该光纤光栅,并输出由该光纤光栅反射的标准波长的光;
光耦合器,用于将从标准波长供给器接收的标准波长的光输出给该可变滤波器;和
控制器,用于将发射接通信号输出给该发光装置驱动器,以监视输入光信号。
2.根据权利要求1的标准波长设定装置,还包括一个暂时存储器,用于暂时存储在该控制器与光通信系统之间交换的光信号信息。
3.根据权利要求1的标准波长设定装置,还包括一个串行通信装置,用于启动在该控制器与外部终端之间的光信号信息的交换。
4.一种在光信道监视模块中的标准波长设定装置,包括:
发光装置模块,用于根据接收的发射接通信号输出宽带光;
光纤光栅,用于从入射的宽带光中只反射标准波长的光;
光分配器,用于将该宽带光输给该光纤光栅,并输出由该光纤光栅反射的标准波长的光;
光耦合器,用于输出从该光分配器接收的标准波长的光;
可变滤波器,当接收到驱动电压时,用于检测从该光耦合器接收的光信号中的预定波长的光和标准波长的光;
可变滤波器驱动器,根据接收的滤波器控制信号将该驱动电压加到该可变滤波器;
光电二极管,用于将从该可变滤波器接收的差错光信号转换为电信号;和
控制器,用于输出提供该标准波长的发射接通信号和监视预定波长的光信号的滤波器控制信号,并监视从该光电二极管接收的电信号中的预定波长的光信号。
5.根据权利要求4的标准波长设定装置,还包括一个暂时存储器,用于暂时存储在控制器与光通信系统之间交换的光信号信息。
6.根据权利要求4的标准波长设定装置,还包括一个串行通信装置,用于启动该控制器与外部终端之间的光信号信息的交换。
CNB011032065A 2000-02-02 2001-02-02 在光信道监视模块中的用于设置标准波长的装置 Expired - Fee Related CN1166103C (zh)

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JP2001255209A (ja) 2001-09-21
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KR20010077366A (ko) 2001-08-17
CN1166103C (zh) 2004-09-08
US20010010740A1 (en) 2001-08-02

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