A Refractive Index Sensor Based on Single Fiber Taper M-Z Interferometer

DING Xiang-xia; DONG Xing-fa; LüZheng-bing; JIANG Li; WU Jing

doi:10.13756/j.gtxyj.2016.05.017

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A Refractive Index Sensor Based on Single Fiber Taper M-Z Interferometer

- A Refractive Index Sensor Based on Single Fiber Taper M-Z Interferometer
- Study on Optical communication Issue 5, Pages: 58-61(2016)
- 作者机构：
  
  苏州科技大学光电与信息技术研究所
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2016.05.017
  CLC： TP212;TH744.3
- Published：2016，
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[1]丁祥霞,董兴法,吕正兵,姜莉,吴婧.基于单纤拉锥M-Z干涉仪的折射率传感器[J].光通信研究,2016(05):58-61.

DING Xiang-xia, DONG Xing-fa, LüZheng-bing, et al. A Refractive Index Sensor Based on Single Fiber Taper M-Z Interferometer. [J]. (5):58-61(2016)
[1]丁祥霞,董兴法,吕正兵,姜莉,吴婧.基于单纤拉锥M-Z干涉仪的折射率传感器[J].光通信研究,2016(05):58-61. DOI： 10.13756/j.gtxyj.2016.05.017.

DING Xiang-xia, DONG Xing-fa, LüZheng-bing, et al. A Refractive Index Sensor Based on Single Fiber Taper M-Z Interferometer. [J]. (5):58-61(2016) DOI： 10.13756/j.gtxyj.2016.05.017.

摘要

在单模光纤中级联两个对称缓锥

中间段去除涂覆层

包层作为传感臂对外界折射率敏感

实验上形成M-Z（马赫-曾德尔）干涉仪。对锥区光场进行分析

当锥腰半径为25!m时

光纤内模场半径达到最大值

约为14.8!m。当锥形光纤锥腰半径为12.5!m、过渡区为5 mm、锥间隔为131 mm时

耦合与合波效果最佳

此时传感臂可检测的酒精浓度范围为0

00%

折射率和波长偏移存在很好的线性关系

灵敏度为-120nm/RIU。该传感器具有插入损耗低、性能稳定和抗干扰能力强等优点

可应用于酒厂酒精度检测和水质监测等领域。

Abstract

In this paper

we cascade two symmetrical slow tapers in a single-mode fiber and remove the coating between two tapers

which achieve a Mach-Zehnder（M-Z）interferometer.The cladding is act as a sensing arm

which is sensitive to the refractive index in the outside world.Through the analysis of the optical field evolution of taper region

mode field radius will reach maximum value of 14.8!m when fiber taper has a radius of 25!m.When taper waist radius is 12.5!m

transition region is 5 mm

and taper region interval is 131 mm

the effect of coupling and waving is best.The sensing arm can detect alcohol concentration in the range of 0

00%

which has a good linear relationship between refractive index and wavelength offset with detection sensitivity of-120nm/RIU.The sensor has advantages of low insertion loss

stable performance and strong anti-interference capacity

which can be applied to areas such as distillery and water quality monitoring.

关键词

光纤光学干涉仪对称缓锥传感器折射率

Keywords

fiber opticsinterferometersymmetrical slow tapersensorrefractive index

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