本文叙述了保偏光纤能够保证传输光波偏振特性的基本原理，介绍了测量保偏光纤拍长的基本方法。
In this paper, we describe the basic principle of polarization maintaining optical fiber and the method to measure the beat length of PM optical fiber.
保偏光纤进行连接时，主轴不对准将影响其偏振保持特性。
In the case of connecting two polarization maintaining fibers (PMF), their polarization maintaining characteristics affected by axial misalignments.
通过监测光栅两个偏振峰的波长来研究三种保偏光纤双折射的高温特性。
Moreover, the birefringence thermal stability of PMFs has been obtained by monitoring the grating resonance wavelength.
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