Materials, Photonic Devices, and Sensors

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

[+] Author Affiliations
Songlin Yang

Xi’an Institute of Optics and Precision Mechanics of CAS, State Key Laboratory of Transient Optics and Photonic, No. 17 Xinxi Road, New Industrial Park, Xi’an Hi-Tech Industrial Development, Xi’an 710119, China

University of Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, China

Chi Ruan, Yuntao Wang

Xi’an Institute of Optics and Precision Mechanics of CAS, State Key Laboratory of Transient Optics and Photonic, No. 17 Xinxi Road, New Industrial Park, Xi’an Hi-Tech Industrial Development, Xi’an 710119, China

Opt. Eng. 55(10), 107101 (Oct 06, 2016). doi:10.1117/1.OE.55.10.107101
History: Received July 21, 2016; Accepted September 13, 2016
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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.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Songlin Yang ; Chi Ruan and Yuntao Wang
"Pressure sensor based on the Sagnac effect and fiber loop ringdown spectroscopy", Opt. Eng. 55(10), 107101 (Oct 06, 2016). ; http://dx.doi.org/10.1117/1.OE.55.10.107101


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