激光与光电子学进展, 2011, 48 (12): 123001, 网络出版: 2011-10-11
快速扫描太赫兹时域光谱系统的研究进展
Research Progress of Rapid Scan Terahertz Time Domain Spectroscopy System
光谱学 太赫兹 太赫兹时域光谱 快速扫描 快速检测 spectroscopy terahertz terahertz time domain spectroscopy rapid scan fast measurement
摘要
太赫兹时域光谱(THz-TDS)技术是一种新兴的光谱测量技术,是太赫兹(THz)领域的研究热点。传统THz-TDS系统利用步进的时间延迟线进行扫描,并通过锁相放大器获得THz信号。这种方法检测THz信号的速度有限,无法应用于某些要求快速测量的场合。而快速扫描THz-TDS系统可以实现THz信号的快速检测,易于进一步扩大其应用范围。总结介绍了快速扫描THz-TDS系统在国内外的代表性研究进展,对几种实现快速扫描的方案进行了分析比较,并提出了一定的改进方法。
Abstract
It is noteworthy that terahertz time-domain spectroscopy (THz-TDS) has been pioneered as a spectral measurement tool, which has drawn much attention in the field of terahertz (THz) wave. Conventional THz-TDS systems employ a stepped delay line for their optical delay line scan and utilize lock-in amplifier (LIA) for the acquisition of THz signals. In this approach, the speed of THz signals sampling is too slow to be introduced into some applications which require a high-speed performance. And the THz waveforms can be acquired in rapid scan THz-TDS system. Therefore, numerous practical applications for THz-TDS systems can be entered much more easily. In this review, we describe the technique for rapid scan THz-TDS and illustrate the various implementations of the technique with recent domestic and oversea examples. In addition, an improved method for rapid scan is proposed.
刘文权, 鲁远甫, 冯广智, 龚小竞, 杨珺, 张艳东, 金雷. 快速扫描太赫兹时域光谱系统的研究进展[J]. 激光与光电子学进展, 2011, 48(12): 123001. Liu Wenquan, Lu Yuanfu, Feng Guangzhi, Gong Xiaojing, Yang Jun, Zhang Yandong, Jin Lei. Research Progress of Rapid Scan Terahertz Time Domain Spectroscopy System[J]. Laser & Optoelectronics Progress, 2011, 48(12): 123001.