Sensing with slow light in an active fiber Bragg grating

被引：0

作者：

Li, Xinxin ^{[1
]}

Qian, Kai ^{[2
]}

Wu, Xuqiang ^{[1
]}

Zhen, Shenglai ^{[1
]}

Li, Shidong ^{[2
]}

Qiu, Da ^{[2
]}

Dong, Xiaojie ^{[2
]}

Yu, Benli ^{[1
]}

Zhan, Li ^{[3
]}

机构：

[1] Anhui Univ, Key Lab Optoelect Informat Acquisit & Manipulat, Minist Educ, Hefei 230601, Anhui, Peoples R China

[2] Hubei Univ Nationalities, Sch Informat Engn, Enshi 445000, Hubei, Peoples R China

[3] Shanghai Jiao Tong Univ, Dept Phys, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China

来源：

2017 INTERNATIONAL CONFERENCE ON OPTICAL INSTRUMENTS AND TECHNOLOGY ADVANCED OPTICAL SENSORS AND APPLICATIONS | 2017年 / 10618卷

基金：

中国国家自然科学基金;

关键词：

fiber sensor; slow light; active fiber Bragg grating; phase-shifted sensitivity; CROSS-GAIN MODULATION; GROUP-VELOCITY; OPTICAL-FIBER; DELAY; PROPAGATION; AMPLIFIER; GAP;

D O I：

10.1117/12.2300534

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The phase-shifted sensitivity of an interferometer can be enhanced by increasing the group index. In this paper, we experimentally demonstrate a slow light sensor by placing an active fiber Bragg grating (FBG) in one arm of the Michelson's interferometer. A 25 KHz AC voltage was applied to a piezoelectric (PZT) set nearby the active FBG. Once the wavelength is varied to near the FBG band edge, the maximum phase-shifted amplitude appears, which is about 1.8 rad and is 4 times greater than that when wavelength is near the center of the reflection band. The active FBG is pumped by a 980 nm laser diode, which can help us to stabilize the system works in the slow light regime to obtain the maximum phase shift. It provides a very simple approach to increase the phase-shifted sensitivity, which is likely to have important applications for strain and acoustic sensors.

引用

页数：6

共 19 条

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