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Optical Engineering

Pressure sensor based on the Sagnac effect and fiber loop ringdown spectroscopy
Author(s): Songlin Yang; Chi Ruan; Yuntao Wang
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Paper Abstract

A fiber-optic sensing scheme of measuring pressure is described here. The high reflective mirror in a laser cavity is replaced by a Sagnac loop in this scheme. The method combining the Sagnac effect with fiber loop ringdown technology fully embodies the advantages of both. The working principle is discussed in detail, and the whole sensing performance is demonstrated by applying sensing force to the sensor area. The sensing force can be obtained by measuring the ringdown time. The pressure measurement range of this device is 40 to 350 N. The detection sensitivity 0.4  ns/N can be realized in this system. The experimental curve reveals a close relationship between the sensing strain and the ringdown time.

Paper Details

Date Published: 6 October 2016
PDF: 4 pages
Opt. Eng. 55(10) 107101 doi: 10.1117/1.OE.55.10.107101
Published in: Optical Engineering Volume 55, Issue 10
Show Author Affiliations
Songlin Yang, Xi'an Institute of Optics and Precision Mechanics, CAS (China)
Univ. of Chinese Academy of Sciences (China)
Chi Ruan, Xi'an Institute of Optics and Precision Mechanics, CAS (China)
Yuntao Wang, Xi'an Institute of Optics and Precision Mechanics, CAS (China)

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