A far-infrared broadband (8.5-37 μm) autocorrelator with sub-picosecond time resolution based on cadmium telluride
A far-infrared broadband (8.5-37 μm) autocorrelator with sub-picosecond time resolution based on cadmium telluride
复制标题
基于碲化镉的亚皮秒时间分辨率的远红外宽带（8.5-37 μm）自相关器
DOI：
10.1016/s0030-4018(01)01442-0
复制
发表时间：
2001
影响因子：
2.4
通讯作者：
A. F. G. Meer
中科院分区：
文献类型：
--
作者：
J. Xu;G. Knippels;D. Oepts;A. F. G. Meer
利用840 μ m楔形碲化镉晶体作为二次谐波发生器，研制了一种用于测量8.5 ~ 37 μm远红外激光脉冲宽度的无背景自相关器。给出了波长为19.7和37 μm的典型强度二次谐波自相关迹线，表明半高宽脉冲宽度分别为0.90和1.5ps。首次测量了18.2 μm的干涉自相关迹线，并在28 μm处显示了由于环境水汽的吸收和再发射而引起的自相关迹线的畸变。
A background-free autocorrelator has been developed for measuring the duration of far-infrared laser pulses in the spectral range from 8.5 to 37 μm by using an 840-μm-long wedged cadmium telluride crystal as the second-harmonic generator. Typical intensity second-harmonic autocorrelation traces are given for the wavelengths of 19.7 and 37 μm, indicating FWHM pulse duration of 0.90 and 1.5 ps respectively. An interferometric autocorrelation trace at 18.2 μm has been measured for the first time, and the distortion of autocorrelation traces due to the absorption and re-emission of ambient water vapor is shown at 28 μm.