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Proceedings Paper

Multilongitudinal mode fiber laser sensor using software radio demodulation
Author(s): Yu Zhou; Shangjing Liu; Pan Dai; Xiangfei Chen
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Paper 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.

Paper Details

Date Published: 20 November 2019
PDF: 7 pages
Proc. SPIE 11192, Real-time Photonic Measurements, Data Management, and Processing IV, 111920X (20 November 2019); doi: 10.1117/12.2537777
Show Author Affiliations
Yu Zhou, Nanjing Univ. (China)
Shangjing Liu, Nanjing Univ. (China)
Pan Dai, Nanjing Univ. (China)
Xiangfei Chen, Nanjing Univ. (China)

Published in SPIE Proceedings Vol. 11192:
Real-time Photonic Measurements, Data Management, and Processing IV
Ming Li; Bahram Jalali; Mohammad Hossein Asghari, Editor(s)

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