Strain measurement based on multimode fiber ring-down spectroscopy

Huiye Qiu; Guozhong Lai; Yufei Wang; Yuxia Su

doi:10.1117/12.833432

24 August 2009 Strain measurement based on multimode fiber ring-down spectroscopy

Huiye Qiu, Guozhong Lai, Yufei Wang, Yuxia Su

Proceedings Volume 7381, International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors; 73810O (2009) https://doi.org/10.1117/12.833432
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

A multimode fiber-loop ring-down spectroscopy for strain measurement is presented. With this technique, strain measurement is achieved in a time domain by measuring the ring-down time. The prototype of the sensor consists of a pulsed VCSEL laser diode, two multimode fiber couplers, a section of multimode fiber loop, photodetector, data acquisition card and signal processing. Experimental results show that the ring-down time has a good linear response to strain in the range from 534.2με to 1013.7με and the strain resolution is as small as 0.338με.

Citation Download Citation

Huiye Qiu, Guozhong Lai, Yufei Wang, and Yuxia Su "Strain measurement based on multimode fiber ring-down spectroscopy", Proc. SPIE 7381, International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors, 73810O (24 August 2009); https://doi.org/10.1117/12.833432

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KEYWORDS

Multimode fibers

Sensors

Spectroscopy

Time metrology

Vertical cavity surface emitting lasers

Avalanche photodetectors

Fiber couplers

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