The invention discloses an optical line protection circuit, accelerate the optical line protection system and method, wherein, the optical line protection circuit includes: accelerating optical power detection circuit, optical power for detecting a first optical path and a second optical output, the first optical path for the current channel optical line protection system, the the second optical path for the backup channel optical line protection system; turn off the control unit, for if the optical power detection circuit detects the light power and light power is less than second light output first light output and the second optical path difference and the optical power output is greater than the first light turn off threshold, the first light path is turned off, the first optical signal loss in the alarm state. The smaller the embodiment of the invention appeared in the current channel attenuation reached off threshold, can be the first light off, so the current working channel from the first optical switch to the second optical path, realize fast switching current channel.
【技术实现步骤摘要】
【技术保护点】
１．一种光线路保护加速电路，其特征在于，包括：光功率检测电路，用于检测第一光路与第二光路输出的光功率，所述第一光路为光线路保护系统的当前工作通道，所述第二光路为光线路保护系统的备用工作通道；关断控制单元，用于若所述光功率检测电路检测到第一光路输出的光功率小于第二光路输出的光功率、且所述第二光路与所述第一光路输出的光功率的差值大于关断阈值，则将所述第一光路关断，使所述第一光路处于丢失信号告警状态。
【技术特征摘要】
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