具有超过6太赫兹光谱覆盖范围的快速扫描太赫兹精密光谱仪。

Rapid-scanning terahertz precision spectrometer with more than 6 THz spectral coverage.

作者信息

Klatt G, Gebs R, Janke C, Dekorsy T, Bartels A

机构信息

Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457, Germany.

出版信息

Opt Express. 2009 Dec 7;17(25):22847-54. doi: 10.1364/OE.17.022847.

DOI:10.1364/OE.17.022847

PMID:20052210

Abstract

We report a terahertz time-domain spectrometer with more than 6 THz spectral coverage and 1 GHz resolution based on high-speed asynchronous optical sampling. It operates at 2 kHz scan rate without mechanical delay stage. The frequency error of the system at 60 s acquisition time is determined by comparing a measured water vapor absorption spectrum to data reported in the HITRAN database. The mean error of 87 evaluated absorption lines is 142 MHz.

摘要

我们报道了一种基于高速异步光学采样的太赫兹时域光谱仪，其光谱覆盖范围超过6太赫兹，分辨率为1吉赫兹。它以2千赫兹的扫描速率运行，无需机械延迟台。通过将测量的水汽吸收光谱与HITRAN数据库中报告的数据进行比较，确定了系统在60秒采集时间下的频率误差。87条评估吸收线的平均误差为142兆赫兹。