在本发明的一个实施例中，光纤段206是具有大于大约32db的光纤损耗的高损耗光纤段。
In one embodiment of the invention, the optical fiber span 206 is a high loss optical fiber span with an optical loss that is greater than about 32 dB.
同时，研究结果表明，这种新型包层折射率调制的光纤光栅可以为解决纤芯高光敏光纤光栅的高损耗问题提供一个较好的解决方案。
Meanwhile, the research results show that the new grating can be a solution to the high attenuation problem of the gratings with the high photosensitive fiber core.
在系统中干涉脉冲遵循确切相同的路径，确保非常高的稳定性和自我补偿，使用法拉第镜自动补偿光纤中的任何双折射效应和偏振相关损耗。
The interfering pulses follow exactly the same spatial path, ensuring very high stability and self-compensating. The use of Faraday mirrors compensates for automatically any birefringence effects...
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