Self-adaptive demodulation for polarization extinction ratio in distributed polarization coupling.
Self-adaptive demodulation for polarization extinction ratio in distributed polarization coupling.
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DOI：
10.1364/ao.52.004353
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发表时间：
2013-06
期刊：
影响因子：
1.9
通讯作者：
Hongxia Zhang;Yaguang Ren;Tiegen Liu;Dagong Jia;Yimo Zhang
中科院分区：
文献类型：
--
作者：
Hongxia Zhang;Yaguang Ren;Tiegen Liu;Dagong Jia;Yimo Zhang
提出了一种自适应的分布式偏振消光比解调方法。它具有动态PER阈值耦合强度（TCI）和非均匀PER迭代步长（ISL）的特点。基于预设的PER计算精度和原始分布耦合强度，可以使TCI和ISL自适应以确定偏振器件内部的贡献耦合点。分布式PER通过自动和选择性地累积这些耦合点来计算。对两种不同类型的保偏光纤进行了测试，使用该方法仅需3-5次迭代即可获得PER。并与Thorlabs商用仪器进行了对比实验，实验结果具有很高的一致性。此外，通过多次重复实验，获得了0.05 dB的最佳预设PER计算精度。
A self-adaptive method for distributed polarization extinction ratio (PER) demodulation is demonstrated. It is characterized by dynamic PER threshold coupling intensity (TCI) and nonuniform PER iteration step length (ISL). Based on the preset PER calculation accuracy and original distribution coupling intensity, TCI and ISL can be made self-adaptive to determine contributing coupling points inside the polarizing devices. Distributed PER is calculated by accumulating those coupling points automatically and selectively. Two different kinds of polarization-maintaining fibers are tested, and PERs are obtained after merely 3-5 iterations using the proposed method. Comparison experiments with Thorlabs commercial instrument are also conducted, and results show high consistency. In addition, the optimum preset PER calculation accuracy of 0.05 dB is obtained through many repeated experiments.