Ultrasonic frequency response of surface attached fiber Bragg grating

Zhuoxuan Li; Li Pei; Bo Dong; Cheng Ma; Anbo Wang

doi:10.1117/12.966348

17 October 2012 Ultrasonic frequency response of surface attached fiber Bragg grating

Zhuoxuan Li, Li Pei, Bo Dong, Cheng Ma, Anbo Wang

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84213Q (2012) https://doi.org/10.1117/12.966348
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

The spectrum shift of FBG to ultrasonic wave is caused by the refractive index profile changing along the FBG, which can be attributed to nonuniform perturbation caused by strain-optic and geometric effects of ultrasonic wave. Response of FBG to the above two effects was analyzed by V-I transmission matrix model, showing high computing efficiency. Spectra response of FBG under changing ultrasonic frequencies was simulated and discussed. In experiment, the system was sensitive enough to detect ultrasonic wave from 15 kHz to 1380 kHz. These results would provide a guideline for FBG-based acoustic detection system design in a specific ultrasonic frequency.

Citation Download Citation

Zhuoxuan Li, Li Pei, Bo Dong, Cheng Ma, and Anbo Wang "Ultrasonic frequency response of surface attached fiber Bragg grating", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84213Q (17 October 2012); https://doi.org/10.1117/12.966348

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