Dual-polarization DBR fiber laser sensor for liquid-level measurement

Jianghai Wo; Jiejun Zhang; Qizhen Sun; Yi Dai; Xiaolei Li; Zhilin Xu; Perry Ping Shum; Deming Liu

doi:10.1117/12.974359

17 October 2012 Dual-polarization DBR fiber laser sensor for liquid-level measurement

Jianghai Wo, Jiejun Zhang, Qizhen Sun, Yi Dai, Xiaolei Li, Zhilin Xu, Perry Ping Shum, Deming Liu

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84214G (2012) https://doi.org/10.1117/12.974359
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A dual-polarization distributed Bragg reflector (DBR) fiber grating laser for liquid level measurement is proposed and experimentally demonstrated. The laser cavity is used as the sensing device. The liquid level is obtained by measuring the beat frequency generated between the two lasing polarizaion modes. The result shows the beat frequency shifts linearly with the water level and a sensitivity of 241 kHz/mm has been obtained. The sensor is simple, easy to fabricate and with high sensitivity to liquid level variation, which could be very helpful in practical applications.

Citation Download Citation

Jianghai Wo, Jiejun Zhang, Qizhen Sun, Yi Dai, Xiaolei Li, Zhilin Xu, Perry Ping Shum, and Deming Liu "Dual-polarization DBR fiber laser sensor for liquid-level measurement", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84214G (17 October 2012); https://doi.org/10.1117/12.974359

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