Journal
APPLIED OPTICS
Volume 56, Issue 26, Pages 7450-7453Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.56.007450
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Funding
- National Natural Science Foundation of China (NSFC) [51275373, 61575148]
- Natural Science Foundation of Hubei Province [2014CFA056]
- 863 Program, National High Technology Research and Development Program of China [2015AA043505]
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The demodulation algorithm is very important to improving the measurement accuracy of a sensing system. In this paper, the variable step size hill climbing search method will be initially used for the optical fiber Fabry-Perot (F-P) sensing demodulation algorithm. Compared with the traditional discrete gap transformation demodulation algorithm, the computation is greatly reduced by changing step size of each climb, which could achieve nano-scale resolution, high measurement accuracy, high demodulation rates, and large dynamic demodulation range. An optical fiber F-P pressure sensor based on micro-electro-mechanical system (MEMS) has been fabricated to carry out the experiment, and the results show that the resolution of the algorithm can reach nano-scale level, the sensor's sensitivity is about 2.5 nm/KPa, which is similar to the theoretical value, and this sensor has great reproducibility. (C) 2017 Optical Society of America
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