A Single-shot Terahertz Time-domain Spectroscopy Instrument for Intense Laser System

8th International Conference on Inertial Fusion Sciences and Applications

Jin, Z.^1 ; Wada, A.^2 ; Shin, J.H.^2 ; Yugami, N.^3 ; Kodama, R.^1,2,4

Photon Pioneers Center, Osaka University, 2-1 Yamada-oka, Suita, Osaka

565-0871, Japan^1

Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka

565-0871, Japan^2

Department of Advanced Interdisciplinary Sciences, Center for Optical Research and Education (CORE), Optical Technology Innovation Center (OpTIC), Utsunomiya University, Yoto 7-1-2, Utsunomiya, Tochigi

321-8585, Japan^3

Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka

565-0871, Japan^4

关键词: Electrooptic effects;    Intense laser;    Spatial resolution;    Spectral encoding;    Spectral fluctuations;    Terahertz time domain spectroscopy;    Terahertz waveform;    Time windows;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012040/pdf
DOI  :  10.1088/1742-6596/688/1/012040

来源: IOP

【 摘 要 】

A single-shot terahertz time-domain spectroscopy method is developed using an echelon-pair. Terahertz waveform is encoded to a beamlets array by electro-optic effect, with a total time window of 37.7 ps and a time step of 94.3 fs. Comparing with spectral encoding methods, this technique directly encodes terahertz waveform to spatial resolution, which is more suited as a terahertz diagnosis for high power ultra-short laser systems with inherent spectral fluctuations.