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 reflection.Tunable diode laser spectroscopy(TDLS) and photoacoustic spectroscopy(PAS) are used to recover the target absorption line profile which is compared with the theoretical Voigt profile.The target gas is 0.01% acetylene(C2H2) in a nitrogen host gas.The 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 EDFA.Good agreement is achieved between the experimental results and the theoretical simulation for the P17 absorption line profile.
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 reflection.Tunable diode laser spectroscopy（TDLS） and photoacoustic spectroscopy（PAS） are used to recover the target absorption line profile which is compared with the theoretical Voigt profile.The target gas is 0.01% acetylene（C2H2） in a nitrogen host gas.The 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 EDFA.Good agreement is achieved between the experimental results and the theoretical simulation for the P17 absorption line profile.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2011年第7期1814-1818,共5页
Spectroscopy and Spectral Analysis
基金
Financial support from National High Technology Research and Development Programof China(Grant No.:2007A A06Z112
2007AA03Z446)
