Techniques are described for drift compensation and scan calibration of a visible-to-infrared difference-frequency converter enabling high-resolution molecular spectra to be recorded with a precision and reproducibility of 5 × 10<sup>-4</sup> cm<sup>-1</sup>. The capabilities of the spectrometer are illustrated by scans of the tetrahedral fine structure in the <i>V</i><sub>3</sub> band of methane under low pressure, Doppler-limited and atmospheric pressure, collision-broadened conditions.
© 1976 Optical Society of America
A. S. Pine, "High-resolution methane V3-band spectra using a stabilized tunable difference-frequency laser system," J. Opt. Soc. Am. 66, 97-108 (1976)