| 时间-频率联合分析消除太赫兹光谱干涉 |
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| 作者姓名： | Sun Q Deng YQ Cao SY Yu J Liu F Wang CL Xing QR |
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| 作者单位： | 中国计量科学研究院光学所;天津大学精密仪器与光电子工程学院; |
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| 基金项目： | 国家科技支撑计划项目,国家重点基础研究发展(973计划)项目,中国计量科学研究院科研基金项目,中国计量科学研究院博士专项科研启动基金项目,天津市科技支撑计划重点项目 |
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| 摘 要： | 基于Fourier变换的传统太赫兹时域光谱分析技术从不同长度的太赫兹信号中产生了不一致的光谱结果,增加太赫兹时域采样长度又会造成光谱的干涉,不利于太赫兹光谱测量的研究和应用。应用小波变换方法对太赫兹波谱作时间—频率联合分析,将不同时刻的太赫兹波谱展开到二维的时间-频率平面,消除了光谱分析的不一致性和光谱干涉的影响。
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| 关 键 词： | 太赫兹 时域光谱 光谱干涉 小波变换 |
Joint time-frequency analysis for removing the spectral interference of terahertz |
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| Sun Q,Deng YQ,Cao SY,Yu J,Liu F,Wang CL,Xing QR.Joint time-frequency analysis for removing the spectral interference of terahertz[J].Spectroscopy and Spectral Analysis,2010,30(12):3169-3173. |
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| Authors: | Sun Qing Deng Yu-Qiang Cao Shi-Ying Yu Jing Liu Feng Wang Chang-Lei Xing Qi-Rong |
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| Institution: | SUN Qing1,DENG Yu-qiang1,CAO Shi-ying1,YU Jing1,LIU Feng2,WANG Chang-lei2,XING Qi-rong2 1.Optics Division,National Institute of Metrology,Beijing 100013,China2.School of Precision Instruments and Optoelectronics Engineering,Tianjin University,Tianjin 300072,China |
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| Abstract: | Conventional Fourier-transform mixes the frequency components of the entire temporal terahertz waveform in one frequency domain;therefore,it cannot distinguish the terahertz frequency in the main pulse from the noise frequency in the pulse tail.Thus traditional Fourier-transform produces inconsistent spectra from different scanning lengths of terahertz pulse.And the interference spectrum appears when the THz echo pulse is recorded.The authors applied wavelet-transform and removed the inconsistent spectra an... |
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| Keywords: | Terahertz Time-domain spectroscopy Spectral interference Wavelet-transform |
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