Multi-longitudinal mode fiber laser sensor using software radio demodulation

被引：1
作者：
Zhou, Yu [1 ,2 ,3 ]
Liu, Shangjing [1 ,2 ,3 ]
Dai, Pan [1 ,2 ,3 ]
Chen, Xiangfei [1 ,2 ,3 ]
机构：
[1] Nanjing Univ, Microwave Photon Technol Lab, Natl Lab Microstruct, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Sch Engn & Appl Sci, Nanjing 210093, Peoples R China
[3] Nanjing Univ, Minist Educ, Key Lab Intelligent Opt Sensing & Manipulat, Nanjing 210093, Peoples R China
来源：
REAL-TIME PHOTONIC MEASUREMENTS, DATA MANAGEMENT, AND PROCESSING IV | 2019年 / 11192卷
关键词：
fiber laser sensor; beat frequency; software radio demodulation; STRAIN; TEMPERATURE;
D O I：
10.1117/12.2537777
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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/degrees C.
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页数：7
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