| 光声气体检测系统中半导体激光器的波长调制 |
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| 引用本文： | 郭潇,刘先勇,郭锋,田进,蒙瑰.光声气体检测系统中半导体激光器的波长调制[J].西南科技大学学报,2011,26(1):78-80,84. |
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| 作者姓名： | 郭潇 刘先勇 郭锋 田进 蒙瑰 |
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| 作者单位： | 西南科技大学光声检测研究室,四川绵阳,621010 |
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| 基金项目： | 西南科技大学与四川省煤炭产业集团重大合作项目，国防预研基金，四川省教育厅重大培育项目，四川省安监局项目 |
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| 摘 要： | 在光声光谱法气体检测中,因为激光器发光波长需与待测气体吸收峰严格匹配,所以需对激光器波长精确调谐.由于半导体激光器发光的波长与温度、驱动电流间有确定的关系,采用波长调制的方法,在一定精度的温度控制下,对波长进行扫描,可确保激光器驱动信号在一个周期内能够产生稳定的光声信号.实验表明,该方案能满足光声气体检测系统的要求.
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| 关 键 词： | 光声光谱法 半导体激光器 波长调制 温度控制 电流驱动 |
Research on a Semiconductor Laser Control-system in a Gas Detection System Based on Photoacoustic Spectroscopy Therory |
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| GUO Xiao,LIU Xian-yong,GUO Feng,TIAN Jing,MENG Gui.Research on a Semiconductor Laser Control-system in a Gas Detection System Based on Photoacoustic Spectroscopy Therory[J].Journal of Southwest University of Science and Technology,2011,26(1):78-80,84. |
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| Authors: | GUO Xiao LIU Xian-yong GUO Feng TIAN Jing MENG Gui |
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| Institution: | GUO Xiao,LIU Xian-yong,GUO Feng,TIAN Jing,MENG Gui(Institute of Photoacoustic Detection,University of Southwest University of Science and Technology,Mianyang 621010,Sichuan,China) |
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| Abstract: | In a photoacoustic spectroscopy system(PAS),as the wavelength of the semiconductor laser(SL) must be strictly match with the absorption peak of the gas tested,one must precisely tune the wavelength of the laser.Because of a certain relation between the wavelength of the SL,the temperature and the driving current,we use the waveform-modulation approach to sweep the waveform of the SL under the control of a certain temperature precision,ensuring the SL's stable photoacoustic signal output in a period.Experime... |
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| Keywords: | Photoacoustic spectroscopy Semiconductor laser Wavelength modulation Temperature Control Current drive |
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