Tuning and stability of a continuous-wave mid-infrared high-power single resonant optical parametric oscillator |
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| Authors: | MMJW van Herpen S Li SE Bisson S te Lintel Hekkert FJM Harren |
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| Institution: | (1) Life Science Trace Gas Facility, Department of Molecular and Laser Physics, University of Nijmegen, P.O. Box 9010, 6500 GL, Nijmegen, The Netherlands, NL;(2) Applied Physics Department, Dalian University of Technology, Dalian, P.R. China, CN;(3) Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94550, USA, US |
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| Abstract: | A 2.2-W continuous-wave, continuously tunable, single-frequency OPO has been developed in the 3.0–3.8 μm wavelength range
for the detection of molecular trace gasses. The oscillation threshold, output power and stability of the single resonant
OPO were improved by optimizing pump beam waist and OPO cavity length. Both air-spaced and solid etalons were tested to frequency
stabilize and tune the OPO, from which the solid etalon gave a better performance. Temperature oscillations in the PPLN crystal
caused oscillations in the idler wavelength of less than 200 MHz over 300 s; the short-term stability was less than 3 MHz
over 1 s. The high laser power, in combination with photoacoustic spectroscopy, achieved a detection limit of 10 parts-per-trillion
for ethane in nitrogen.
Received: 9 April 2002 / Revised version: 14 June 2002 / Published online: 2 September 2002
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ID="*"Corresponding author. Fax:+31-24/3653311, E-Mail: maartenh@sci.kun.nl |
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| Keywords: | PACS: 42 65 Yj 82 80 Kq 42 62 Fi |
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