Temperature-insensitive load sensor with a single fiber Bragg grating

Limin Hu; Xinyong Dong; Chunliu Zhao; Shuqin Zhang; Shangzhong Jin

doi:10.1117/12.870247

9 November 2010 Temperature-insensitive load sensor with a single fiber Bragg grating

Limin Hu, Xinyong Dong, Chunliu Zhao, Shuqin Zhang, Shangzhong Jin

Proceedings Volume 7853, Advanced Sensor Systems and Applications IV; 78532W (2010) https://doi.org/10.1117/12.870247
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

A simple novel load sensor has been demonstrated by embedding a uniform fiber Bragg grating (FBG) along the axis of a tapered cylindrical polymer rod. Due to the load-induced nonuniform strain field applied along the length of the FBG, the bandwidth of its reflection spectrum varies linearly with the applied load. By measuring the reflected optical power of the chirped FBG illuminated by a flattened broadband light source, temperature-insensitive measurement of load is realized. It is intensity-modulated so that complex wavelength interrogation system is avoided in the sensor system. In the experiment, the achieved sensitivity is 0.99 nW/N over a range from 0 to 43.12 N. Since the FBG is well protected by embedding in the tapered elastic polymer rod, excellent reliability is expected.

Citation Download Citation

Limin Hu, Xinyong Dong, Chunliu Zhao, Shuqin Zhang, and Shangzhong Jin "Temperature-insensitive load sensor with a single fiber Bragg grating", Proc. SPIE 7853, Advanced Sensor Systems and Applications IV, 78532W (9 November 2010); https://doi.org/10.1117/12.870247

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