Abstract
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-1) covering the important C–H stretch region while a high spectral resolution (<0.1 cm-1) 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
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