Abstract
Tunable mid-infrared radiation with a power level of is generated by quasi-phase-matched difference-frequency mixing of a Nd:YAG laser and a tunable-diode laser (near ) in multigrating periodically poled . The wavelength and temperature bandwidths are and , respectively. The temperature-tuning slope of the phase-matched idler wavelength, , is almost twice that of periodically poled . We use the measurements to derive a mid-infrared-corrected Sellmeier equation for the axis of . The generated mid-infrared radiation is applied to sensitive high-resolution spectroscopy of the band of methane.
© 2000 Optical Society of America
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