中国激光, 2018, 45 (8): 0806001, 网络出版: 2018-08-11  

一种新颖的1/4波片制作方法 下载: 947次

A Novel Quarter-Wave Plate Fabricating Technique
作者单位
北京工业大学应用数理学院, 北京 100124
摘要
光纤1/4波片是光纤电流传感系统中的关键器件,为此提出并实现了一种1/4波片制作方法。该方法将两段长度近似相等的高双折射光纤(HBF)以轴间夹角90°进行熔接,然后拉伸其中一段光纤使得它们的相位差为π/2,从而制成1/4波片。调节时,将正交熔接的光纤接入到3 dB耦合器构成高双折射光纤环镜(Hi-Bi FLP),实时检测环镜的透过率以确定相位差。推导了检测系统的透过率公式,详细分析了调节过程中透过率曲线的变化规律,并根据透过率及透过率曲线的斜率来确定相位差。搭建了调节系统,验证了该方法的可行性。该方法具有准确度高、调节方便等优点。
Abstract
Quarter-wave plate is a key component in fiber current sensing system. A quarter-wave plate fabricating technique is proposed and demonstrated. The two sections of high-birefringence fibers (HBF) with approximately equal length are orthogonally fused and the angle between their fast axes is 90°. Stretching one of two fibers can adjust the phase difference between the two fibers to be π/2 precisely. A high-birefringent fiber loop mirror (Hi-Bi FLM) is realized by the two fibers fused to 3 dB coupler and the phase difference is determined by real-time detection of the transmissivity of the Hi-Bi FLM. The transmissivity function of the Hi-Bi FLM is deduced and the variation of the transmissivity is analyzed in detail. The phase difference is confirmed experimentally based on the transmissivity curve and its slope. The fabricating technique which has been achieved experimentally, and has excellent features, such as high accuracy and convenient operation.

王强龙, 胡曙阳, 王云新, 杨旭东. 一种新颖的1/4波片制作方法[J]. 中国激光, 2018, 45(8): 0806001. Wang Qianglong, Hu Shuyang, Wang Yunxin, Yang Xudong. A Novel Quarter-Wave Plate Fabricating Technique[J]. Chinese Journal of Lasers, 2018, 45(8): 0806001.

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