Ultrasensitive detection of nitric oxide at 5.33 μm by using external cavity quantum cascade laser-based Faraday rotation spectroscopy

被引：126

作者：

Lewicki, Rafal ^{[1
]}

Doty, James H., III ^{[1
]}

Curl, Robert F. ^{[1
]}

Tittel, Frank K. ^{[1
]}

Wysocki, Gerard ^{[2
]}

机构：

[1] Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA

[2] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2009年 / 106卷 / 31期

基金：

美国国家科学基金会;

关键词：

external cavity laser; nitric oxide detection; midinfrared; magnetic circular birefringence; paramagnetic species; MODULATION SPECTROSCOPY; LMR SPECTROSCOPY; BAND; SPECTROMETER; PERFORMANCE;

D O I：

10.1073/pnas.0906291106

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A transportable prototype Faraday rotation spectroscopic system based on a tunable external cavity quantum cascade laser has been developed for ultrasensitive detection of nitric oxide ( NO). A broadly tunable laser source allows targeting the optimum Q(3/2)(3/2) molecular transition at 1875.81 cm(-1) of the NO fundamental band. For an active optical path of 44 cm and 1-s lock-in time constant minimum NO detection limits (1 sigma) of 4.3 parts per billion by volume (ppbv) and 0.38 ppbv are obtained by using a thermoelectrically cooled mercury-cadmium-telluride photodetector and liquid nitrogen-cooled indium-antimonide photodetector, respectively. Laboratory performance evaluation and results of continuous, unattended monitoring of atmospheric NO concentration levels are reported.

引用

页码：12587 / 12592

页数：6

共 25 条

[1] A DIFFERENTIAL DETECTION SCHEME FOR FARADAY-ROTATION SPECTROSCOPY WITH A COLOR CENTER LASER [J].