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1. 发明授权

US5293263A Electro-optical modulator which provides optical bias stabilization during operation 失效
标题翻译：在操作过程中提供光学偏置稳定的电光调制器
公开(公告)号：US5293263A
公开(公告)日：1994-03-08
申请号：US860866
申请日：1992-03-31
申请人： Alexander C. De Rijck
发明人： Alexander C. De Rijck
IPC分类号： H04B10/155 , H04B10/04 , H04B10/06
CPC分类号： H04B10/503 , H04B10/504 , H04B10/564
摘要： An optical transmitter comprising a control loop for stabilizing the bias current which sets a bias level of the amount of light emitted by a laser diode 6. A cascade circuit 5 which includes the laser diode 6, a photodiode 7 and a variable gain control amplifier 8 is connected in the negative feedback path of the control loop. To prevent amplitude modulation of the bias current when a modulation signal occurs at the input of the gain control amplifier, the control loop produces a cancelling signal of a magnitude which cancels the mean value of such modulation signal. The cancelling signal is derived from the modulation signal in a fixed manner, by fixing the transfer factor of the negative feedback path as measured by transmission of an auxiliary signal through such path and adjusting the gain of amplifier 8 in accordance with the result of such measurements.
摘要翻译：一种光发射机，包括用于稳定偏置电流的控制回路，该偏置电流设置由激光二极管6发射的光量的偏置电平。包括激光二极管6，光电二极管7和可变增益控制放大器8的级联电路5 连接在控制回路的负反馈路径中。为了防止调制信号在增益控制放大器的输入端发生时偏置电流的幅度调制，控制环路产生消除这种调制信号的平均值的幅度的消除信号。消除信号以固定的方式从调制信号导出，通过固定通过这种路径传输辅助信号所测量的负反馈路径的传送因子，并根据这种测量结果调整放大器8的增益。

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