Continuous wave optical parametric oscillator for quartz-enhanced photoacoustic trace gas sensing

被引：0
|
作者：
A.K.Y. Ngai
S.T. Persijn
I.D. Lindsay
A.A. Kosterev
P. Groß
C.J. Lee
S.M. Cristescu
F.K. Tittel
K.-J. Boller
F.J.M. Harren
机构：
[1] Radboud University,Life Science Trace Gas Facility, Molecular and Laser Physics, Institute for Molecules and Materials
[2] University of Twente,Laser Physics and Nonlinear Optics Group, Faculty of Science and Technology
[3] Rice University,Department of Electrical and Computer Engineering
来源：
Applied Physics B | 2007年 / 89卷
关键词：
Tuning Fork; Idle Wavelength; Resonant Optical Parametric Oscillator; QEPAS Signal; Pole Lithium Niobate Crystal;
D O I：
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中图分类号：
学科分类号：
摘要：
A continuous wave optical parametric oscillator, generating up to 300 mW idler output in the 3–4 μm wavelength region, and pumped by a fiber-amplified DBR diode laser is used for trace gas detection by means of quartz-enhanced photoacoustic spectroscopy (QEPAS). Mode-hop-free tuning of the OPO output over 5.2 cm-1 and continuous spectral coverage exceeding 16.5 cm-1 were achieved via electronic pump source tuning alone. Online monitoring of the idler wavelength, with feedback to the DBR diode laser, provided an automated closed-loop control allowing arbitrary idler wavelength selection within the pump tuning range and locking of the idler wavelength with a stability of 1.7×10-3 cm-1 over at least 30 min.
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