摘要
引入小波变换将太赫兹脉冲波形变换到二维的时间-频率平面,对太赫兹脉冲时间-频率特性作联合分析.Gabor小波的形状因子是控制小波时间-频率特性的重要参数,通过改变Gabor小波形状因子提高了小波分析太赫兹脉冲的时间分辨率和频率分辨率.
We applied different shaping factors of Gabor wavelet for the analysis of terahertz time-domain spectroscopy with wavelet- transform. Gabor wavelet analysis allows a convenient switching between time domain and frequency domain by varying shaping factors. The comparison of absorption spectral lines obtained between with wavelet-transform and with other methods demonstrated that wavelet-transform is a reliable technique for the analysis of the absorption properties and the extraction of the characteristic spectral lines in terahertz range.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第12期7747-7752,共6页
Acta Physica Sinica
基金
中国计量科学研究院科研基金(批准号:AKY0748)
国家科技支撑计划(批准号:2006BAF06B05)
科学技术部国际合作计划(批准号:2007DFA11430)
中国计量科学研究院博士专项科研启动基金(批准号:TGQD05-12)资助的课题~~
关键词
太赫兹辐射
小波变换
频谱分析
terahertz radiation, wavelet-transform, spectra analysis
