Study on Structurally Modulated Long-period Fiber Grating Temperature Sensor
The temperature monitoring of fuel system is very important for the safety,performance and reliability of aircraft.In this paper,a long-period fiber grating sensor based on laser etching method is proposed and tested,which can be used for temperature monitoring of aircraft fuel system.By demodulating the resonant peak wavelength variation of fiber grating,the precise measurement of ambient temperature can be realized.Experimental results show that this sensor has a temperature sensitivity of 83.1pm/℃and achieves a strain response of 0.32pm/με.Due to the characteristics of flexibility,corrosion resistance and electromagnetic interference resistance for the optical fibers,the proposed sensor can be flexibly installed in the complex structure of the aircraft,which has the ability to improve the safety and reliability of the aircraft.
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