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Proceedings Paper

Sensing with slow light in an active fiber Bragg grating
Author(s): Xinxin Li; Kai Qian; Xuqiang Wu Jr.; Shenglai Zhen Jr.; Shidong Li; Da Qiu; Xiaojie Dong; Benli Yu; Li Zhan
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Paper Abstract

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.

Paper Details

Date Published: 10 January 2018
PDF: 6 pages
Proc. SPIE 10618, 2017 International Conference on Optical Instruments and Technology: Advanced Optical Sensors and Applications, 106180Z (10 January 2018); doi: 10.1117/12.2300534
Show Author Affiliations
Xinxin Li, Anhui Univ. (China)
Kai Qian, Hubei Univ. for Nationalities (China)
Xuqiang Wu Jr., Anhui Univ. (China)
Shenglai Zhen Jr., Anhui Univ. (China)
Shidong Li, Hubei Univ. for Nationalities (China)
Da Qiu, Hubei Univ. for Nationalities (China)
Xiaojie Dong, Hubei Univ. for Nationalities (China)
Benli Yu, Anhui Univ. (China)
Li Zhan, Shanghai Jiao Tong Univ. (China)

Published in SPIE Proceedings Vol. 10618:
2017 International Conference on Optical Instruments and Technology: Advanced Optical Sensors and Applications
Xuping Zhang; Hai Xiao; Francisco Javier Arregui; Liquan Dong, Editor(s)

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