Absorption Line Profile Recovery Based on TDLS and MEMS Micro-Mirror for Photoacoustic Gas Sensing

作     者：LI Li Norhana Arsad George Stewart Deepak Uttamchandani Brian Culshaw WANG Yi-ding 

作者机构：State Key Laboratory on Integrated Optoelectronies College of Electronic Science and Engineering Jilin University Changchun 130012 China Centre for Microsystems and Photonics Dept. of Electronic ＆ Electrical Engineering University of Strathclyde Glasgow UK G1 1XW Dept. of Electronics Electrics and Systems University of National Malaysia Selangor Malaysia 43600 

出 版 物：《光谱学与光谱分析》 (Spectroscopy and Spectral Analysis)

年 卷 期：2011年第31卷第7期

页      面：1814-1818页

核心收录：

学科分类：07[理学] 0804[工学-仪器科学与技术] 070302[理学-分析化学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：Financial support from National High Technology Research and Development Programof China(Grant No.:2007A A06Z112 2007AA03Z446) 

主　　题：Micro-electro-mechanical-systems(MEMS) Laser intensity modulation Absorption line profile recovery Tunable diode laser spectroscopy Photo-acoustic gas sensing 

摘      要：A novel and efficient absorption line recovery technique is presented.A micro-electromechanical systems(MEMS) mirror driven by an electrothermal actuator is used to generate laser intensity modulation through the mirror *** diode laser spectroscopy(TDLS) and photoacoustic spectroscopy(PAS) are used to recover the target absorption line profile which is compared with the theoretical Voigt *** target gas is 0.01% acetylene(C2H2) in a nitrogen host *** laser diode wavelength is swept across the P17 absorption line of acetylene at 1 535.4 nm by a current ramp,and an erbium-doped fibre amplifier(EDFA) is used to enhance the optical intensity and increase the signal-to-noise ratio(SNR).A SNR of about 35 is obtained with 100 mW laser power from the *** agreement is achieved between the experimental results and the theoretical simulation for the P17 absorption line profile.