一种基于温控半导体激光波长扫描的光纤瓦斯测量系统
发布时间：2018-10-18 12:45
【摘要】：设计了一种基于温控半导体激光波长扫描的光纤煤矿瓦斯测量系统,通过改变中心波长1 653 nm半导体分布式反馈(DFB)激光器的工作温度来扫描半导体DFB激光器的输出波长,在5 nm波长扫描范围内,存在明显的瓦斯气体吸收峰。半导体DFB激光器输出的光注入被测气体室,气体室的输出光携带有瓦斯气体浓度信息,用光电探测器将光信号转化为电信号,再由A/D采集卡采集到信号处理系统,通过对有吸收峰位置的光功率和无吸收峰位置的光功率进行比较,则可计算出瓦斯浓度。该传感系统采用80 m A恒流源驱动半导体DFB激光器,使其输出光强保持不变,其结构简单、灵敏度高。
[Abstract]:A kind of optical fiber coal mine gas measurement system based on temperature controlled semiconductor laser wavelength scanning is designed. The output wavelength of semiconductor DFB laser is scanned by changing the working temperature of 1 653 nm semiconductor distributed feedback (DFB) laser. In the range of 5 nm wavelength scanning, there is obvious gas absorption peak. The light output from the semiconductor DFB laser is injected into the gas chamber. The output light of the gas chamber carries the gas concentration information. The light signal is converted into an electric signal by the photodetector, and the signal processing system is collected by the A / D acquisition card. The gas concentration can be calculated by comparing the optical power with the absorption peak position and the optical power without the absorption peak position. The sensing system uses 80mA constant current source to drive the semiconductor DFB laser, which keeps the output intensity unchanged, and its structure is simple, and its sensitivity is high.
【作者单位】： 成都工业学院电子工程学院;北京理工大学光电学院;川煤集团芙蓉煤矿有限公司;
【基金】：省科技支撑计划项目(2011GZ0254) 博士基金项目(2016RC005)
【分类号】：TD712;TN249
本文编号：2279162
[Abstract]:A kind of optical fiber coal mine gas measurement system based on temperature controlled semiconductor laser wavelength scanning is designed. The output wavelength of semiconductor DFB laser is scanned by changing the working temperature of 1 653 nm semiconductor distributed feedback (DFB) laser. In the range of 5 nm wavelength scanning, there is obvious gas absorption peak. The light output from the semiconductor DFB laser is injected into the gas chamber. The output light of the gas chamber carries the gas concentration information. The light signal is converted into an electric signal by the photodetector, and the signal processing system is collected by the A / D acquisition card. The gas concentration can be calculated by comparing the optical power with the absorption peak position and the optical power without the absorption peak position. The sensing system uses 80mA constant current source to drive the semiconductor DFB laser, which keeps the output intensity unchanged, and its structure is simple, and its sensitivity is high.
【作者单位】： 成都工业学院电子工程学院;北京理工大学光电学院;川煤集团芙蓉煤矿有限公司;
【基金】：省科技支撑计划项目(2011GZ0254) 博士基金项目(2016RC005)
【分类号】：TD712;TN249
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