Simultaneous strain and temperature measurement using a highly birefringence fiber loop mirror and a long-period grating written in a photonic crystal fiber |
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| Authors: | Chun-Liu Zhao Jiarong Zhao Wei Jin Jian Ju L Cheng Xuguang Huang |
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| Institution: | aDepartment of Electrical Engineering, Hong Kong Polytechnic University, Hong Kong;bLaboratory of Photonic Information Technology, South China Normal University, Guangzhou, China;cDepartment of Mechanical Engineering, Hong Kong Polytechnic University, Hong Kong |
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| Abstract: | We present a new design for simultaneous strain and temperature measurement using a high-birefringence fiber loop mirror (HiBi-FLM) concatenated with a temperature-insensitive long-period grating (LPG) written in a photonic crystal fiber (PCF). The FLM acts as a sensor head, while the LPG in PCF serves as a filter to convert wavelength variation to optical power change. By measuring the wavelength variation and the power difference of two near peaks in the spectral response of this configuration, simultaneous strain and temperature measurement is obtained. |
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| Keywords: | Long-period grating Fiber loop mirror Photonic crystal fiber Optical fiber sensor |
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