CAJ | 학술논문

为对华中科技大学一台在建的高平均功率、可调谐（1～10 T Hz ）的自由电子激光太赫兹辐射源进行高精度、全频段相干检测，设计了基于电光采样原理的测量方案，该方案具有响应速度快、灵敏度高、噪声小、测量带宽大等特点。通过理论计算分析，得到探测飞秒激光脉冲以及太赫兹脉冲的偏振方向与电光晶体晶轴方向的最优夹角，分析了探测飞秒激光与太赫兹脉冲在常用电光晶体（ZnTe、GaAs、GaP）中的相位匹配，并给出了适合该太赫兹频段的探测晶体种类和厚度参数，为后期的调试和实验提供理论和技术支持。
위대화중과기대학일태재건적고평균공솔、가조해（1～10 T Hz ）적자유전자격광태혁자복사원진행고정도、전빈단상간검측，설계료기우전광채양원리적측량방안，해방안구유향응속도쾌、령민도고、조성소、측량대관대등특점。통과이론계산분석，득도탐측비초격광맥충이급태혁자맥충적편진방향여전광정체정축방향적최우협각，분석료탐측비초격광여태혁자맥충재상용전광정체（ZnTe、GaAs、GaP）중적상위필배，병급출료괄합해태혁자빈단적탐측정체충류화후도삼수，위후기적조시화실험제공이론화기술지지。
The electro‐optic (EO ) sampling method was employed for the coherent detection of a tunable high power FEL‐T Hz source at Huazhong University of Science and Technology (HUST‐TFEL) ,due to its short response time ,high sensitivity ,low noise and wide bandwidth .Based on the theoretical analysis ,the optimal polarization orientations of the femtosecond laser pulse and the T Hz pulse with respect to the EO crystal axis were obtained ,and the phase match properties of the two laser pulses in the normal EO crystals (ZnTe ,GaAs and GaP ) were analyzed .Also the feasible crystal types and their optimal thicknesses were presented .The results provide useful guidance for the future detection debugging and experiment .