High precision fiber bragg grating wavelength demodulation system based on spectrum segmentation

被引：0
作者：
Yang, Gang [1 ]
Xu, Guoliang [1 ]
Tu, Guojie [1 ]
Xia, Lan [1 ]
机构：
[1] Institute of Optical Communication Engineering, Nanjing University, Nanjing, 210093, Jiangsu
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2015年 / 42卷 / 04期
关键词：
Fabry-Perot etalon; Fiber Bragg grating sensor system; Fiber optics; Spectrum segmentation demodulation; Tunable Fabry-Perot filter;
D O I：
10.3788/CJL201542.0405001
中图分类号：
学科分类号：
摘要：
A high precision fiber Bragg grating wavelength demodulation system based on spectrum segmentation is proposed and experimentally demonstrated. Fabry-Perot etalon is added into the traditional Fabry-Perot filter method to dynamically calibrate the read-out value of the filter wavelength, which can eliminate measurement errors caused by the temperature drift effect or the peristaltic effect of Fabry-Perot filter. Meanwhile the amplified spontaneous emission (ASE) spectral characteristics and etalon are used to segment the wavelength for demodulation, which can greatly reduce the effects of the nonlinear effect of Fabry-Perot filter to improve the demodulation accuracy of wavelength and enhance the stability of the demodulation system. The result shows that stability of the system is 0.97 pm, the resolution is 0.33 pm, and the linearity of temperature is 0.9999. ©, 2015, Science Press. All right reserved.
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