| 波长调制技术在掺铒光纤腔内吸收气体传感中的应用 |
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| 引用本文： | 马凤,汪曣,韩文念,赵学玒,杨春梅,李宁.波长调制技术在掺铒光纤腔内吸收气体传感中的应用[J].传感技术学报,2009,22(8). |
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| 作者姓名： | 马凤 汪曣 韩文念 赵学玒 杨春梅 李宁 |
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| 作者单位： | |
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| 基金项目： | 国家自然科学基金项目资助(60577013) |
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| 摘 要： | 在掺铒光纤腔内吸收气体传感系统进行气体检测时,由于受到放大自发辐射噪声、标准具效应等因素影响,气体浓度检测信号强度和检测浓度极限受到了很大的限制。为了解决上述问题,将广泛应用于可调谐二极管激光器吸收光谱的波长调制技术应用到掺铒光纤腔内吸收传感系统,利用实验分析了二次谐波信噪比与泵浦驱动电流、调制频率以及调制深度的关系,从理论上分析推导的最佳波长调制深度也与实验得到的调制深度非常吻合。采用波长调制技术得到气体传感系统的检测浓度极限为140×10-6。
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| 关 键 词： | 光纤传感 掺铒光纤激光器 波长调制 气体检测 光谱吸收 |
Application of Wavelength Modulation in Erbium-doped Fiber Laser Intra-cavity Absorption Gas Sensor |
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| HAN Wennian,MA Feng,WANG Yan,ZHAO Xuehong,YANG Chunmei,LI Ning.Application of Wavelength Modulation in Erbium-doped Fiber Laser Intra-cavity Absorption Gas Sensor[J].Journal of Transduction Technology,2009,22(8). |
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| Authors: | HAN Wennian MA Feng WANG Yan ZHAO Xuehong YANG Chunmei LI Ning |
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| Affiliation: | HAN Wennian,MA Feng,WANG Yan,ZHAO Xuehong,YANG Chunmei,LI Ning College of Pricision Instrument & Opto-electronics Engineering,Tianjin University,Tianjin 300072,China |
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| Abstract: | Erbium-doped fiber intra-cavity absorption gas sensor(ICAGS) system has been experimented and reported.But the sensitivity of gas detection and the minimum detectable gas concentration are limited by the existences of amplified spontaneous emission(ASE) noise,the etalon effects,as well as background noise of amplifier.In order to solve these issues,wavelength modulation technique,which has been used widely in tunable diode laser absorption spectroscopy,is applied to ICAGS system.The relationships between si... |
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| Keywords: | fiber sensors erbium-doped fiber laser wavelength modulation gas detection spectrum absorption |
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