基于太赫兹量子级联激光器的反射式快速扫描成像  

Fast Reflective Scanning Imaging Based on Terahertz Quantum-Cascade Laser

作　　者：李孟奇[1,2] 谭智勇[1] 邱付成[1] 万文坚[1] 王长[1] 曹俊诚[1,2] 

机构地区：[1]中国科学院上海微系统与信息技术研究所太赫兹固态技术重点实验室,上海200050 [2]上海科技大学信息科学与技术学院,上海201210

出　　处：《光学学报》2017年第6期95-101,共7页Acta Optica Sinica

基　　金：国家重点基础研究发展计划(2014CB339803);国家重大科学仪器设备开发专项(2011YQ150021);国家自然科学基金(61405233);上海市科学技术委员会项目(15DZ0500103;17ZR1448300;14530711300)

摘　　要：以太赫兹(THz)量子级联激光器为光源、低温热辐射计为信号接收端,采用可旋转和平移的二维扫描平台搭建反射式快速扫描成像系统。通过计算机控制扫描平台进行连续的旋转与平移运动,实时获取探测信号强度和样品位置信息,成功实现对直径为80mm圆形区域的快速扫描成像,扫描时间为5s,图像的平均空间分辨率约为1mm,系统成像时间大幅缩短。此外,成像装置中基于THz分束片的共光路设计,可有效减少系统光路元件,进一步缩小成像系统的体积。A fast reflective scanning imaging system is constructed by employing the terahertz（THz）quantum-cascade laser as the light source and the low-temperature bolometer as the signal receiver.A rotational and translational platform is used in this imaging system to realize fast scanning.The fast imaging process of a circle area with a diameter of 80 mm is demonstrated by a computer controlling the scanning platform to carry out the rotational and translational motion.The signal intensity and the related 2D sample position are acquired simultaneously.By the imaging system,the scanning time is 5 s and the spatial resolution of the obtained image is 1 mm,which greatly shortens the imaging time.Furthermore,the optical components are reduced effectively by the co-optical path design based on THz beam splitters,which reduces the size of the THz imaging system.

关 键 词：成像系统 太赫兹 反射成像 太赫兹量子级联激光器 旋转平移二维扫描 共光路 

分 类 号：TN29[电子电信—物理电子学]