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Title: Dual-polarization DBR fiber laser sensor for liquid-level measurement
Authors: Shum, Perry Ping
Wo, Jianghai
Zhang, Jiejun
Sun, Qizhen
Dai, Yi
Li, Xiaolei
Xu, Zhilin
Liu, Deming
Keywords: DRNTU::Engineering::Electrical and electronic engineering
DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Issue Date: 2012
Source: Wo, J., Zhang, J., Sun, Q., Dai, Y., Li, X., Xu, Z., Shum, P. P., & Liu, D. (2012). Dual-polarization DBR Fiber Laser Sensor for Liquid-level Measurement. Proceedings of SPIE - The International Society for Optical Engineering, 8421.
Series/Report no.: Proceedings of SPIE - The international society for optical engineering
Conference: International Conference on Optical Fiber Sensors (22nd : 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.
DOI: 10.1117/12.974359
Schools: School of Electrical and Electronic Engineering 
Rights: © 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). This paper was published in Proceedings of SPIE - The International Society for Optical Engineering and is made available as an electronic reprint (preprint) with permission of Society of Photo-Optical Instrumentation Engineers (SPIE). The paper can be found at the following official DOI: [].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Conference Papers

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