Analysis of terahertz waveguide modes in continuous wavelet domain  

作　　者：谷建强 田震 邢岐荣 王昌雷 栗岩锋 刘丰 柴路 王清月 

机构地区：[1]Center for Terahertz Waves and Ultrafast Laser Laboratory,College of Precision Instrument and Optoelectronics Engineering,Key Laboratory of Opto-Electronics Information and Technical Science (Ministry of Education),Tianjin University

出　　处：《Chinese Optics Letters》2010年第11期1057-1060,共4页中国光学快报（英文版）

基　　金：supported by the National "973" Project of China(No. 2007CB310408);the National Natural Science Foundation of China(No. 60578037);the National Natural Science Foundation of China-Rassian Foundation for Basic Research Program 2007-2008(No. 60711120198);the Major Project of Tianjin Sci-Tech Support Program(No. 08ZCKFZC28000);the International Joint Program in Tianjin(No. 07ZCGHH01100);the Project 985 Program of Tianjin University

摘　　要：Conventional analytical methods in the wavelet domain are used to present an analysis of terahertz （THz） waveguide modes.To obtain THz radiation pulses passing through a waveguide,we build a simple experimental system with a 5-mm-long,230-μm-inner-diameter stainless steel waveguide.The single-mode guided signal from the experiments and the multi-mode signal of a similar THz waveguide reported in the literature are analyzed using the continuous wavelet transform （CWT）.The results demonstrate that analyzing THz waveguide modes in the wavelet domain not only possesses all the functionality of the traditional THz time-domain spectroscopy （TDS） data processing but also has the ability to unscramble quantitatively and intuitively detailed information about the target samples,such as mode type,cut-off frequency,amplitude distinction,and group velocity.Conventional analytical methods in the wavelet domain are used to present an analysis of terahertz （THz） waveguide modes.To obtain THz radiation pulses passing through a waveguide,we build a simple experimental system with a 5-mm-long,230-μm-inner-diameter stainless steel waveguide.The single-mode guided signal from the experiments and the multi-mode signal of a similar THz waveguide reported in the literature are analyzed using the continuous wavelet transform （CWT）.The results demonstrate that analyzing THz waveguide modes in the wavelet domain not only possesses all the functionality of the traditional THz time-domain spectroscopy （TDS） data processing but also has the ability to unscramble quantitatively and intuitively detailed information about the target samples,such as mode type,cut-off frequency,amplitude distinction,and group velocity.

关 键 词：Data handling Stainless steel Terahertz waves Time domain analysis WAVEGUIDES Wavelet transforms 

分 类 号：TN252[电子电信—物理电子学] O451[理学—无线电物理]