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In this paper we study the structure of panda fibers how to effect the birefringence (beat length) by an infinitesimal element method.
本文用微元算法研究了熊猫光纤的结构参量对熊猫光纤双折射特性(拍长)的影响。
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.
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。
One of the most important parameters about high birefringence fibers is the beat length. Because of its shortness and periodicity, measuring beat length is a critical one.
高双折射光纤的一个重要参数是拍长，由于拍长很短和周期性变化，如何实现准确测量是十分困难的。
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