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发明授权
CN1674474B 光传送装置及其控制方法 失效 - 权利终止 转让

光传送装置及其控制方法
摘要：
提供一种无论在没有传送路径的损失变动或复用波长数变化的通常状态，还是在产生传送路径的损失变化或复用波长数变化的异常状态，都能够适宜控制各信号光的强度，确保通信质量的光传送装置及其控制方法。一种光传送装置，其由下述部件构成：从接收的波分复用信号光中分离监视光、检测监视光强度的装置(31、41)；检测监视光分离后的波分复用信号光的强度的装置(32、42)；放大上述波分复用信号光的增益控制型光放大器(34)；用于调整放大的波分复用信号光强度的光衰减器(35)；与上述光放大器一直成为恒定增益的控制同时，以波分复用信号光的输出强度为规定的目标值那样，控制上述光衰减器的衰减量的监视控制部(20)。监视控制部在上述监视光强度的变动在容许范围内，信号光强度的变动在容许范围以外时，通过上述光衰减器抑制输出光强度的恒定控制。
摘要（英）：

An optical transmission apparatus comprising a first detector for detecting the power of the supervisory signal light separated from received wavelength-division multiplexed signal lights; a second detector for detecting the power of the wavelength-division multiplexed signal lights after the separation of the supervisory signal light; a gain-controlled type optical amplifier for amplifying the wavelength-division multiplexed signal lights; an optical attenuator coupled to the amplifier; and a control unit for controlling the optical amplifier and the optical attenuator so as to keep the output level of the wavelength-division multiplexed signal lights to a predetermined target value, wherein the control unit restrains automatic output level control by the optical attenuator when the supervisory signal light power fluctuates within its permissible range and fluctuations in the signal light power have deviated from its permissible range.

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