Multilongitudinal mode fiber laser sensor using software radio demodulation

Yu Zhou; Shangjing Liu; Pan Dai; Xiangfei Chen

doi:10.1117/12.2537777

20 November 2019 Multilongitudinal mode fiber laser sensor using software radio demodulation

Yu Zhou, Shangjing Liu, Pan Dai, Xiangfei Chen

Proceedings Volume 11192, Real-time Photonic Measurements, Data Management, and Processing IV; 111920X (2019) https://doi.org/10.1117/12.2537777
Event: SPIE/COS Photonics Asia, 2019, Hangzhou, China

Abstract

A multi-longitudinal mode (MLM) laser sensor system based on software radio demodulation is proposed, which realizes the simultaneous measurement of vibration and temperature. The software demodulation is realized through the SDR (Software Defined Radio) technique due to the applied vibration can be analyzed as the superposition of a series of frequency modulation (FM) signals. Furthermore, the absorption of erbium-doped fiber (EDF) decreases with the increase of temperature, so the output power of the laser can be measured as another sensing signal. As a result, by demodulating these two sensing signals, the vibration from 10 Hz to 2 kHz can be successfully measured and the sensitivity of the temperature is around 0.011 dBm/°C.

Citation Download Citation

Yu Zhou, Shangjing Liu, Pan Dai, and Xiangfei Chen "Multilongitudinal mode fiber laser sensor using software radio demodulation", Proc. SPIE 11192, Real-time Photonic Measurements, Data Management, and Processing IV, 111920X (20 November 2019); https://doi.org/10.1117/12.2537777

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