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发明公开
CN104704690A 光放大器、波分复用光传输系统以及程序 失效 - 放弃专利权

光放大器、波分复用光传输系统以及程序
摘要：
在复用信号光(MS1、MS2)通过光放大器(10)进行放大时，对监视信号(E1)的值、和与复用信号光(MS1、MS2)的噪声指数开始增大时的监视信号(E1)的值等效的阈值(Th1)进行比较。并且，在监视信号(E1)的值为阈值以上时、即复用信号光(MS1、MS2)的功率较大时，通过进行增益恒定控制，进行复用信号光(MS1、MS2)的放大。另一方面，在监视信号(E1)的值小于阈值时、即复用信号光(MS1、MS2)的功率较小时，通过进行输出恒定控制，进行复用信号光(MS1、MS2)的放大。
摘要（英）：

When multiplexed signal lights (MS1, MS2) are amplified by optical amplifiers (10), a value of a monitor signal (E1) is compared with a threshold equivalent to a value of the monitor signal when noise indexes of the multiplexed signal lights (MS1, MS2) start increasing. Next, when the value of the monitor signal (E1) is equal to or larger than the threshold (Th1), that is, when the powers of the multiplexed signal lights (MS1, MS2) are large, a gain constant control is performed to amplify the multiplexed signal lights (MS1, MS2). Conversely, when the value of the monitor signal is smaller than the threshold, that is, when the powers of the multiplexed signal lights are small, an output constant control is performed to amplify the multiplexed signal lights(MS1, MS2).

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