Optical amplifying device
专利汇可以提供Optical amplifying device专利检索，专利查询，专利分析的服务。并且PURPOSE: To detect the fluctuation in the intensity of input light without entailing the loss of signal light and to compensate gain saturation by providing a 2nd semiconductor optical amplifier which is cascade-connected to a 1st semiconductor optical amplifier and a control circuit which controls the current to be implanted to the 2nd semiconductor optical amplifier according to the voltage between the terminals of the 1st semiconductor optical amplifier.
CONSTITUTION: The information on the change in the intensity of the input signal light monitored by the voltage between the terminals of the optical amplifier A2 is inputted to the control circuit F2. The current implanted to the optical amplifier A3 is so controlled in the control circuit F2 as to compensate the fluctuation in the gain generated in the optical amplifier A2. For example, the decrease component of the gain is compensated by increasing the current to be implanted to the optical amplifier A3 if the intensity of the input light is large and the gain deceases. The signal gain over the entire part adding the signal gains of the optical amplifiers A2 and A3 is kept at a specified value in this way regardless of the fluctuation in the intensity of the input signal light by controlling the current to be implanted to the optical amplifier A3 in such a manner. The optical amplifying device which effectively amplifies the inputted signal light without deteriorating the signal by the fluctuation in the gain is obtd. in this way.
COPYRIGHT: (C)1991,JPO&Japio，下面是Optical amplifying device专利的具体信息内容。
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