Cascaded Fabry-Perot Interferometers with Vernier Effect for Gas Pressure Measurement

被引：0

作者：

Lin, Hongfeng ^{[1
]}

Xu, Yanyan ^{[1
]}

Mumtaz, Farhan ^{[1
]}

Dai, Yutang ^{[1
]}

Zhou, Ai ^{[1
]}

机构：

[1] Wuhan Univ Technol, Natl Engn Lab Fiber Opt Sensing Technol, Wuhan 430074, Peoples R China

来源：

2019 18TH INTERNATIONAL CONFERENCE ON OPTICAL COMMUNICATIONS AND NETWORKS (ICOCN) | 2019年

基金：

美国国家科学基金会;

关键词：

Fabry-Perot interferometer; Vernier effect; gas pressure; MACH-ZEHNDER INTERFEROMETERS; SENSOR; FIBER;

D O I：

暂无

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

A sensitivity enhanced gas pressure sensor with Vernier effect is proposed in this paper. The sensor is a cascade configuration which includes two Fabry-Perot interferometers (FPIs) with different free spectrum range (FSR). Each Fabry-Perot interferometer is fabricated by inserting a piece of hollow core fiber (HCF) in between two sections of single mode fiber (SMF). Femtosecond laser is applied for drilling an opening on the HCF of sensing FPI to make the air hole interact with outside environment, while the air hole of the reference FPI is kept closed. Gas pressure response is measured by monitoring the wavelength shift of the envelope extracted from the superimposed spectrum of the cascaded FPIs. Experimental results show that the sensitivity of the cascade configuration can attain -65.482nm/MPa, which is -13 times of single sensing FPI.

引用

页数：3

共 8 条

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