Temperature and strain sensor based on weak LPG and fiber ring down

Bo Liu; Boo Guan; Guiling Sun; Guiyun Kai

doi:10.1117/12.738668

2 July 2007 Temperature and strain sensor based on weak LPG and fiber ring down

Bo Liu, Boo Guan, Guiling Sun, Guiyun Kai

Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66193O (2007) https://doi.org/10.1117/12.738668
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy

Abstract

A fiber ring down with a weak long period grating for temperature and strain sensing is proposed and demonstrated. The sensing devices consist of two matched fiber Bragg gratings, a section of single mode fiber, a weak long period grating, a pulsed laser source and a photodiode. The LPG incorporated in fiber ring cavity is used as sensing element, the induced resonance wavelength shift of which will cause an additional loss in the cavity. As a result, the amplitude of applied temperature variation or strain can be obtained by simply measuring the fiber ring down time. The proposed sensing system has advantages of easy configuration and rapid response.

Citation Download Citation

Bo Liu, Boo Guan, Guiling Sun, and Guiyun Kai "Temperature and strain sensor based on weak LPG and fiber ring down", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66193O (2 July 2007); https://doi.org/10.1117/12.738668

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