Intensity measurement based temperature-independent strain sensor using a highly birefringent photonic crystal fiber loop mirror |
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| Authors: | Wenwen Qian Xinyong Dong |
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| Institution: | a Institute of Optoelectronic Technology, China Jiliang University, Hangzhou, Chinab Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China |
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| Abstract: | A fiber-optic strain sensor is demonstrated by using a short length of highly birefringent photonic crystal fiber (HiBi-PCF) as the sensing element inserted in a fiber loop mirror (FLM). Due to the ultralow thermal sensitivity of the HiBi-PCF, the proposed strain sensor is inherently insensitive to temperature. When a distributed-feedback (DFB) laser passes through the FLM, the output power is only affected by the transmission spectral change of the FLM caused by the strain applied on the HiBi-PCF. Based on intensity measurement, an optical power meter is adequate to deduce the strain information and an expensive optical spectrum analyzer (OSA) would not be needed. |
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| Keywords: | Highly birefringent photonic crystal fiber (HiBi-PCF) Fiber loop mirror (FLM) Strain senor Intensity measurement |
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