Part-per-million gas detection from long-baseline THz spectroscopy

被引：58

作者：

Harmon, SA ^{[1
]}

Cheville, RA ^{[1
]}

机构：

[1] Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.1788896

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report a long-baseline THz time domain spectrometer based on a White cell design capable of detecting gas species in the low part-per-million range in near real time. Coherent transients from methyl chloride vapor are observed directly in the time domain using a 5.0 m path length at pressures down to 1 Pa. Both phase sensitive (lock-in) detection and direct signal averaging using a rapid-scanning delay line are used for data acquisition. (C) 2004 American Institute of Physics.

引用

页码：2128 / 2130

页数：3