| 时分复用光纤光栅传感阵列中DFB激光器的高精度温控设计 |
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| 引用本文： | 胡辽林,章鹏博,华灯鑫,巩鑫.时分复用光纤光栅传感阵列中DFB激光器的高精度温控设计[J].传感技术学报,2012,25(7):921-925. |
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| 作者姓名： | 胡辽林 章鹏博 华灯鑫 巩鑫 |
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| 作者单位： | 西安理工大学机械与精密仪器工程学院 |
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| 基金项目： | 国家自然科学基金项目(60878050);陕西省教育厅科学研究计划项目(2010JK716) |
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| 摘 要： | 针对时分复用光纤光栅(TDM-FBG)传感阵列中使用的分布反馈(DFB)激光器高波长稳定度的要求,设计了一个高精度的DFB温控方案,包括温度测量与设定、热敏电阻线性化、PID补偿回路、H桥驱动、温度电压采集与显示等。使用DFB内置的热敏电阻和半导体制冷器(TEC)对温控电路进行了测试,其精度在180s内达到±0.04℃,温控后激光器温度变化引起的应变测量误差为±3.4με左右,满足TDM-FBG传感阵列的要求。
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| 关 键 词： | 光纤光栅 传感 时分复用 分布反馈激光器 温控 |
Design of DFB Laser’s High Performance Temperature Controller in TDM FBG Sensing Array |
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| HU Liaolin,ZHANG Pengbo,HUA Dengxin,GONG Xin.Design of DFB Laser’s High Performance Temperature Controller in TDM FBG Sensing Array[J].Journal of Transduction Technology,2012,25(7):921-925. |
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| Authors: | HU Liaolin ZHANG Pengbo HUA Dengxin GONG Xin |
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| Affiliation: | (School of Mechanical and Precision Instrument Engineering,Xi ’ an University of Technology,Xi’an 710048,China) |
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| Abstract: | In order to meet high wavelength stability of DFB in time division multiplexing fiber Bragg grating(TDM-FBG)sensing array,temperature control circuits of DFB are designed,including temperature measurement and set circuits,thermistor linearization,H-bridge driving circuits,PID compensation network,temperature voltage sampling circuits and display circuits.The parameters of DFB ’ s temperature control circuits are tested by using the built-in thermistor and TEC,its accuracy can reach ±0.04 ℃ within 180 seconds.This result shows that the strain measurement error from laser ’ s temperature drift will be ±3.4με after temperature control. |
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| Keywords: | fiber Bragg grating sensing time division multiplexing distributed feedback temperature controller |
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