Pressure sensor based on the Sagnac effect and fiber loop ringdown spectroscopy

Songlin Yang; Chi Ruan; Yuntao Wang

doi:10.1117/1.OE.55.10.107101

6 October 2016 Pressure sensor based on the Sagnac effect and fiber loop ringdown spectroscopy

Songlin Yang, Chi Ruan, Yuntao Wang

Author Affiliations +

Optical Engineering, Vol. 55, Issue 10, 107101 (October 2016). https://doi.org/10.1117/1.OE.55.10.107101

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.

Citation Download Citation

Songlin Yang, Chi Ruan, and Yuntao Wang "Pressure sensor based on the Sagnac effect and fiber loop ringdown spectroscopy," Optical Engineering 55(10), 107101 (6 October 2016). https://doi.org/10.1117/1.OE.55.10.107101

Published: 6 October 2016

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