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。
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.
出处
《激光与光电子学进展》
CSCD
北大核心
2011年第12期26-32,共7页
Laser & Optoelectronics Progress
基金
深圳市科技研发资金(JC201005270343A)资助课题
关键词
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
