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The effect of the inaccuracy in line of fiber optic F-P sensing head on SNR in fabry-perot sensor
YANG Yao-en(1,2);LIU Ming-zhi(1);WANG Qing-min(2);SUN Bao-chen(2)
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Abstract: When fiber optic Fabry-Perot strain sensor undergo strain in engineering, the effect from the malposition of the sensing head on the Signal Noise Ratio(SNR) is discussed in this paper. The effect power changes with the malposition in line, and makes the SNR changeable. The mathematical analytical model is founded by using the electro magnetic theory and the numerical simulation is carried by using a computer. The results are that the larger the malposition, the higher the SNR. When the malposition in line is near to 0.1, th SNR will tend to be relatively stable and the sensor will be ineffective. An experiment is carried to prove the theory and both results are almost identical.
Key words: Fabry-Perot strain sensor, malposition in line, SNR
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YANG Yao-en(1;2);LIU Ming-zhi(1);WANG Qing-min(2);SUN Bao-chen(2).
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URL: https://journal.xidian.edu.cn/xdxb/EN/
https://journal.xidian.edu.cn/xdxb/EN/Y2006/V33/I3/462
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