A fiber strain and vibration sensor with high birefringence polarization maintaining fiber based on Sagnac interferometer

Yi Li; Xinyong Dong

doi:10.1117/12.907009

30 November 2011 A fiber strain and vibration sensor with high birefringence polarization maintaining fiber based on Sagnac interferometer

Yi Li, Xinyong Dong

Author Affiliations +

Proceedings Volume 8201, 2011 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 820128 (2011) https://doi.org/10.1117/12.907009
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

Abstract

The paper describes a fiber sensor for the evaluation of static axis strain and dynamic vibration. A section of high birefringence polarization maintaining fiber (Hi-Bi PMF) is incorporated in a Sagnac fiber loop as the sensing element. The static axis strain measurement is realized by analyzing the attenuation peak wavelength shifts and the strain sensitivity of 1.09 pm/μs is achieved. Using the power intensity demodulation method, the experimental results of dynamic acoustic vibration measurement show that it can detect the acoustic vibrations over the frequency range of 50Hz to 22 kHz.

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Yi Li and Xinyong Dong "A fiber strain and vibration sensor with high birefringence polarization maintaining fiber based on Sagnac interferometer", Proc. SPIE 8201, 2011 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 820128 (30 November 2011); https://doi.org/10.1117/12.907009

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