Vernier effect based on optical fiber Sagnac interference loop with two angle shift spliced polarization maintaining fibers and its application on temperature sensor

Chun-liu ZHAO; Zhen-ming DING; Bin-qing WU

doi:10.3788/OPE.20172509.2283

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Vernier effect based on optical fiber Sagnac interference loop with two angle shift spliced polarization maintaining fibers and its application on temperature sensor

Modern Applied Optics | 更新时间：2020-08-13

- Vernier effect based on optical fiber Sagnac interference loop with two angle shift spliced polarization maintaining fibers and its application on temperature sensor
- Optics and Precision Engineering Vol. 25, Issue 9, Pages: 2283-2291(2017)
- 作者机构：
  
  中国计量大学光学与电子科技学院, 浙江杭州 310018
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20172509.2283
  CLC： TN253;S951.4
- Received：17 April 2017，
  
  Accepted：16 May 2017，
  
  Published：25 September 2017
- 稿件说明：
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Chun-liu ZHAO, Zhen-ming DING, Bin-qing WU. Vernier effect based on optical fiber Sagnac interference loop with two angle shift spliced polarization maintaining fibers and its application on temperature sensor[J]. Optics and precision engineering, 2017, 25(9): 2283-2291.
DOI：

Chun-liu ZHAO, Zhen-ming DING, Bin-qing WU. Vernier effect based on optical fiber Sagnac interference loop with two angle shift spliced polarization maintaining fibers and its application on temperature sensor[J]. Optics and precision engineering, 2017, 25(9): 2283-2291. DOI： 10.3788/OPE.20172509.2283.

摘要

为了实现高灵敏度的温度传感

通过在基于保偏光纤Sagnac干涉仪的Sagnac环内增加一段保偏光纤

控制两段保偏光纤快轴熔接角度接近45°

设计并制造了保偏光纤转轴熔接Sagnac干涉环结构。在理论上通过Jones矩阵推导了保偏光纤转轴熔接Sagnac干涉环的干涉谱公式

基于仿真分析研究了主要参数对保偏光纤转轴熔接Sagnac干涉环输出特性的影响。仿真结果表明

保偏光纤转轴熔接Sagnac干涉环实现了光学游标效应

两段保偏光纤的平均长度、两段保偏光纤的长度差分别影响保偏光纤转轴熔接Sagnac干涉环输出干涉谱的波长间隔和包络周期；在实验中

将保偏光纤转轴熔接Sagnac干涉环应用在光纤温度传感器中。实验结果表明

在2 cm的感温区域

保偏光纤转轴熔接Sagnac干涉环温度传感器的灵敏度就达到了-2.44 nm/℃

是普通Sagnac干涉环温度传感器（-0.163 nm/℃）的14.97倍。

Abstract

An optical fiber Sagnac interference loop with two angle shift spliced polarization maintaining fibers was designed and fabricated to realize high-sensitivity temperature sensing. In the optical fiber Sagnac loop

two sections of polarization maintaining fibers were spliced with an intersection angle of 45° between their fast axes. The interference spectrum formula of the Sagnac interference loop by the Jones matrix was deduced theoretically. The influence of main parameters of the formula on the output characteristics of the Sagnac interference loop was studied in simulation. The simulation results show that vernier effect can be achieved in the optical fiber Sagnac interference loop with two angle shift spliced polarization maintaining fibers

of which the average length and the length difference affect wavelength intervals and envelope periods of output interference spectra of the Sagnac interference loop

respectively. In addition

the optical fiber Sagnac interference loop with two angle shift spliced polarization maintaining fibers was applied as a fiber temperature sensor experimentally. The results show that the sensitivity of the proposed temperature sensor based on Sagnac interference loop is -2.44 nm/℃ within 2 cm temperature zone

which is 14.97 times as compared with that (-0.163 nm/℃) of ordinary Sagnac loop sensors without vernier effect.

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Keywords

references

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