Digital demodulation algorithm for white-light fiber-optic interferometric sensors

被引：6
作者：
Miridonov, SV [1 ]
Shlyagin, MG [1 ]
Khomenko, AV [1 ]
Spirin, VV [1 ]
机构：
[1] CICESE, Res Ctr, San Diego, CA 92143 USA
来源：
INTERFEROMETRY XI: TECHNIQUES AND ANALYSIS | 2002年 / 4777卷
关键词：
fiber-optic sensor; white-light interferometry; sensor demodulation; signal processing;
D O I：
10.1117/12.472213
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
New digital demodulation algorithm for white-light interferometric sensors with signal processing in spectral domain is presented. The algorithm uses phase calculation from an interferometric pattern in the acquired spectrum from the sensor to evaluate the optical path difference. Suggested demodulation method provides high accuracy with uncertainty close to theoretical limit imposed by system noise. For a fiber-optic sensor with birefringent fiber and a CCD spectrometer for signal acquisition, the algorithm demonstrated the random error of the optical path difference estimate about 0.18 mm.
引用
收藏
页码：136 / 142
页数：7
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