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公开(公告)号：US20030123066A1
公开(公告)日：2003-07-03
申请号：US10325178
申请日：2002-12-20
IPC分类号： G01B009/02
CPC分类号： G01J9/04 , H01S5/0687 , H04B10/07957 , H04B10/572 , H04B10/85
摘要： In an optical communications network employing a wavelength division multiplexing (WDM) system, different wavelengths of electromagnetic radiation are used to transmit different signals. Because the wavelength of electromagnetic radiation that a laser device emits can drift as the temperature of the laser device changes, channels can overlap causing cross-talk. Consequently, the present invention provides a laser wavelength locking control loop apparatus (5) comprising a wavelength selective device (9) and a photodector (11), coupled to a feedback controller circuit (13). Electromagnetic radiation emitted by the laser device (7) is provided to the wavelength selective device (9) which provides a first output signal at a first wavelength and a second output signal at a second wavelength. The first and second output signals are directed to the photodetector (11) so as to coincide when incident thereupon. A beat signal results from the coincidence of the first and second output signals and this is used to measure wavelength drift.
摘要翻译： 在采用波分复用（WDM）系统的光通信网络中，使用不同波长的电磁辐射来传输不同的信号。 由于激光装置发射的电磁辐射的波长随着激光装置的温度变化而漂移，因此通道可能会重叠，导致串扰。 因此，本发明提供了一种激光波长锁定控制环路装置（5），其包括耦合到反馈控制器电路（13）的波长选择装置（9）和光电转换器（11）。 激光装置（7）发射的电磁辐射被提供给提供第一波长的第一输出信号和第二波长的第二输出信号的波长选择装置（9）。 第一和第二输出信号被引导到光电检测器（11），以便当它们入射时一致。 差拍信号是由第一和第二输出信号的一致产生的，这用于测量波长漂移。
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公开(公告)号：US20040085744A1
公开(公告)日：2004-05-06
申请号：US10288803
申请日：2002-11-06
发明人： Kim Leeson , Keith Everett
IPC分类号： H05K009/00
CPC分类号： H05K9/0058 , H01R13/6582 , H01R13/6594
摘要： An electronic module (200) having a configuration (212) for promoting efficient heat dissipation and a circuit board assembly (202, 205, 206) are provided such that when said electronic module (200) is inserted within said circuit board assembly (202, 205, 206) a portion of said electronic module (200) overlaps an EMI shield (205), with said portion of said electronic module (200) having a configuration (212) for promoting efficient heat dissipation and being external of said EMI shield (205).
摘要翻译： 具有用于促进高效散热的构造（212）和电路板组件（202,205,206）的电子模块（200）被设置成使得当所述电子模块（200）插入所述电路板组件（202,202,206）内时， 所述电子模块（200）的一部分与EMI屏蔽（205）重叠，所述电子模块（200）的所述部分具有用于促进有效散热并且位于所述EMI屏蔽外部的配置（212） 205）。
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公开(公告)号：US20030123065A1
公开(公告)日：2003-07-03
申请号：US10325053
申请日：2002-12-20
IPC分类号： G01B009/02
CPC分类号： G01J9/04 , H01S5/0687 , H04B10/07951 , H04B10/572 , H04B10/85
摘要： In an optical communications system employing a Wavelength Division Multiplexing (WDM) scheme, a laser device can be used to transmit electromagnetic radiation at different wavelengths, each different wavelength being known as a channel. In addition, a demultiplexer such as an Arrayed Waveguide Grating (AWG) can be used to separate out a multiplexed signal into its component channels. It is known that laser devices and AWGs are susceptible to wavelength drift as their temperatures change or aging occurs, in the case of the AWGs causing channels to overlap which results in cross-talk between adjacent channels. Consequently, the present invention provides an apparatus for detecting cross-talk and method therefor. To this end, a first and a second output signal from a wavelength selective device (9) are directed to be coincident upon a photodetector (11). A homodyne beat signal results from the coincidence of the first and the second output signal and the homodyne beat signal is used to measure wavelength drift.
摘要翻译： 在采用波分复用（WDM）方案的光通信系统中，激光装置可用于传输不同波长的电磁辐射，每个不同的波长被称为通道。 此外，可以使用诸如阵列波导光栅（AWG）的解复用器将复用的信号分离成其分量信道。 众所周知，在AWG导致信道重叠的情况下，激光器件和AWG随着其温度变化或老化而易于波长漂移，导致相邻通道之间的串扰。 因此，本发明提供了一种用于检测串扰的装置及其方法。 为此，来自波长选择装置（9）的第一和第二输出信号指向在光电检测器（11）上重合。 零差拍信号是由第一和第二输出信号的一致产生的，并且使用零差拍信号来测量波长漂移。
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