We describe a broadly tunable, cw optical parametric oscillator (OPO) based on periodically poled lithium niobate. The OPO can be tuned over a broad region in the mid IR (2900–3100 cm<sup>−1</sup>) covering the important C–H stretch region while a high spectral resolution (<0.1 cm<sup>−1</sup>) is maintained. The OPO is the light source for a field-portable photoacoustic spectrometer for gas-phase monitoring of volatile organic compounds.
© 2001 Optical Society of America
Scott E. Bisson, Karla M. Armstrong, Thomas J. Kulp, and Matthew Hartings, "Broadly Tunable, Mode-Hop-Tuned cw Optical Parametric Oscillator Based on Periodically Poled Lithium Niobate," Appl. Opt. 40, 6049-6055 (2001)