Two novel fibre devices, fibre optic frequency shifter and fibre optic polarization controller, are employed in this system. The principle and design method for the two key devices are described.

在该系统中采用了自行研制设计的实现全光纤化的两个关键光纤元件：普通单模光纤频率偏移器和普通单模光纤偏振控制器，介绍了此两光纤元件的基本工作原理和设计方法。

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