首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Femtosecond laser source for real-time atmospheric gas sensing in the UV–visible
Authors:M Ere-Tassou  C Przygodzki  E Fertein  H Delbarre
Institution:

Laboratoire de Physico-Chimie de l’Atmosphère, UMR CNRS 8101, Université du Littoral-Côte d’Opale, MREID, 145 Avenue Maurice Schumann, Dunkerque 59140, France

Abstract:We propose an experimental method for detecting molecules in the UV–visible range using ultrashort laser pulses. Two types of sources are used: a continuum generated by 200 kHz Ti:sapphire regenerative amplifier system extending from 320 to 1100 nm, and a near-gaussian femtosecond pulse (100 fs) generated by an optical parametric amplifier. Both broadband sources allow the real-time detection of the oxygen, the nitrogen dioxide NO2 and the water vapor bands. Moreover, the concentration of NO2 can be determined within the 10 ppb sensitivity range by using a specific nonlinear fit technique.
Keywords:Non-linear optical  UV–visible continuum  OPA  Femtosecond pulses  Absorption spectroscopy
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号