| 可调谐激光二极管吸收光谱残余光强调制补偿技术研究 |
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| 引用本文： | 梁波,朱永,鲍伟义,陈俊清,张军,陈俊. 可调谐激光二极管吸收光谱残余光强调制补偿技术研究[J]. 传感技术学报, 2010, 23(7): 939-943. DOI: 10.3969/j.issn.1004-1699.2010.07.010 |
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| 作者姓名： | 梁波 朱永 鲍伟义 陈俊清 张军 陈俊 |
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| 作者单位： | 重庆大学光电技术及系统教育部重点实验室,重庆,400030;重庆四联集团技术中心,重庆,401121 |
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| 基金项目： | 国家"863"计划项目资助 |
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| 摘 要： | 分析了可调谐激光二极管吸收光谱仪器中残余光强幅度调制对谐波探测和全数字化信号处理的影响;搭建了基于电压可调谐光强衰减器(MEMS VOA)的光强残余幅度调制的补偿实验系统平台;实验结果表明,本补偿装置可以把残余光强调制降低到补偿前的1/20,并将其带来的二次谐波线型畸变降低60 %以上;初步证实了利用本方法消除二次谐波畸变并实现全数字化处理的可行性.
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| 关 键 词： | 吸收光谱 残余光强调制 衰减器 补偿 |
Study on the Compensation Technology of Remaining Light Intensity Modulation in TDLAS |
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| LIANG Bo,ZHU Yong,BAO Weiyi,CHEN Junqing,ZHANG Jun,CHEN Jun. Study on the Compensation Technology of Remaining Light Intensity Modulation in TDLAS[J]. Journal of Transduction Technology, 2010, 23(7): 939-943. DOI: 10.3969/j.issn.1004-1699.2010.07.010 |
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| Authors: | LIANG Bo ZHU Yong BAO Weiyi CHEN Junqing ZHANG Jun CHEN Jun |
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| Abstract: | The influence of the remaining intensity modulation on second harmonic detection and digital signal processing in tunable diode laser absorption spectroscopy system was analyzed. A synchronous compensation method was put forward and an experimental setup based on the variable optical attenuator (MEMS VOA) was put up. The experimental result shows that with the synchronous compensation of the VOA, the remaining intensity modulation level was dropped down to 1/20 of its original level, and about 60% of the second harmonic distortion was removed. The feasibility of this synchronous compensation method was tentatively demonstrated by our experiments. |
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| Keywords: | absorption spectroscopy remaining light intensity modulation attenuator compensation |
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