| Novel Distributed Fiber Bragg Grating Sensing System Based on M-Z Interferometer |
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| 作者姓名： | WUGuo-qing BIWei-hong LIHong |
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| 作者单位： | Lab.ofOpticalFiberSensing,YanshanUniversity,Qinhuangdao066004,CHN |
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| 摘 要： | One of the problems in using grating sensors is how to measure a small Bragg wavelength shift accurately. Nowadays demodulation techniques are mainly based on the edge filter, tunable filter, or interferometric scanning methods. Interferometric demodulation is widely accepted as the technology which can provide the high sensitivity. An interrogation system using the interferometric scanning method is presented, in which an unbalanced fiber M-Z interferometer is used as the wavelength scanner for temperature measurement. A novel fiber Bragg grating sensor system based on M-Z interferometric demodulation technique is presented in this paper. The temperature sensitivity measured in the experiment is almost consistent with that obtained from the theoretic calculation.
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| 关 键 词： | 分布式光纤布拉格光栅 M-Z干涉计 干涉量度 时分多路转换 |
| 收稿时间： | 2004/6/11 |
Novel Distributed Fiber Bragg Grating Sensing System Based on M-Z Interferometer |
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| WUGuo-qing BIWei-hong LIHong.Novel Distributed Fiber Bragg Grating Sensing System Based on M-Z Interferometer[J].Semiconductor Photonics and Technology,2005,11(1):56-60. |
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| Authors: | WU Guo-qing BI Wei-hong LI Hong |
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| Abstract: | One of the problems in using grating sensors is how to measure a small Bragg wavelength shift accurately. Nowadays demodulation techniques are mainly based on the edge filter, tunable filter, or interferometric scanning methods. Interferometric demodulation is widely accepted as the technology which can provide the high sensitivity. An interrogation system using the interferometric scanning method is presented, in which an unbalanced fiber M-Z interferometer is used as the wavelength scanner for temperature measurement. A novel fiber Bragg grating sensor system based on M-Z interferometric demodulation technique is presented in this paper. The temperature sensitivity measured in the experiment is almost consistent with that obtained from the theoretic calculation. |
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| Keywords: | Fiber Bragg grating Interferometric demodulation Time-division multiplexing Complicated programmable logic device |
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