| TDLAS中激光器IM/FM相位延迟实时测量方法研究 |
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| 引用本文： | 张超,马维光.TDLAS中激光器IM/FM相位延迟实时测量方法研究[J].光谱学与光谱分析,2014,34(11):2908-2911. |
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| 作者姓名： | 张超 马维光 |
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| 作者单位： | 1. 太原理工大学新型传感器与智能控制教育部与山西重点实验室，山西 太原 030024
2. 山西大学激光光谱研究所，山西 太原 030024 |
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| 摘 要： | 在基于谐波检测法的TDLAS（可调谐二极管激光吸收光谱)系统中，在通过改变激光器注入电流实现激光频率扫描和调制的同时引起激光强度的变化，激光器输出信号的强度-频率(IM/FM)相位延迟m的变化将直接导致谐波系数波动，带来系统误差。提出一种利用光纤迈克尔逊干涉仪实现激光器输出信号强度-频率(IM/FM)相位延迟m的测量方法，能在激光器调制测量的同时实时测量相位延迟m。实验结果表明，激光器输出信号强度-频率(IM/FM)相位延迟m与理论值π有一定差异。研究提出的方法可以用来实时补偿信号强度-频率(IM/FM)相位延迟m对气体浓度测量结果的影响。
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| 关 键 词： | TDLAS 波长调制 光纤干涉 相位延迟 |
| 收稿时间： | 2013-09-25 |
IM/FM Phase Delay Time Measurement Method of Laser for TDLAS |
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| ZHANG Chao,MA Wei-guang.IM/FM Phase Delay Time Measurement Method of Laser for TDLAS[J].Spectroscopy and Spectral Analysis,2014,34(11):2908-2911. |
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| Authors: | ZHANG Chao MA Wei-guang |
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| Institution: | 1. Key Lab of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China2. Institute of Spectroscopy, Shanxi University, Taiyuan 030024, China |
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| Abstract: | The present paper presents an method of using fiber Michelson interferometer to measure the Intensity-frequency (IM/FM) phase delay change of the laser, it could realize the phase delay time measurement, while modulating the laser. Experimental results show that the laser output signal intensity-frequency (IM/FM) phase delay of the laser has some differences from the theoretical value. The proposed method can be used to compensate for real-time signal strength-frequency (IM/FM) phase delay effect on the gas concentration measurement results. |
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| Keywords: | TDLAS Wavelength modulation Optical fiber interferometer Phase delay |
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