Abstract

Heterodyne frequency measurements on the 01¹1–00⁰0 band of N₂O have been made with the use of a tunable-diode laser, a CO laser transfer oscillator, and a CO₂ laser frequency synthesizer. A beat frequency was measured between a CO laser and a tunable-diode laser whose frequency was locked to the peak of N₂O absorption features. The frequency of the CO laser was simultaneously determined by measuring the beat frequency with respect to a reference synthesized from two CO₂ lasers. New rovibrational constants are given for the 01¹1 state of N₂O, which are in excellent agreement with previous results, although the band center is 4 MHz higher than in the previous measurements. A table of the line frequencies and their absolute uncertainties is given for the N₂O absorption lines in the wave-number region from 1830 to 1920 cm⁻¹. Some additional frequency measurements near the lower-frequency end of the 02⁰0–00⁰0 band have also been made with respect to a ¹²C¹⁸O₂ laser.

© 1985 Optical Society of America

Frequencies of N₂O in the 1100- to 1440-cm⁻¹ region

Robert A. Toth
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Heterodyne frequency measurements with a tunable diode laser-CO₂ laser spectrometer: spectroscopic reference frequencies in the 9.5-μm band of carbonyl sulfide

J. S. Wells, F. R. Petersen, and A. G. Maki
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N₂O vibration–rotation parameters derived from measurements in the 900–1090-and 1580–2380-cm⁻¹ regions

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Heterodyne frequency measurements on the 11.6-μm band of OCS: new frequency/wavelength calibration tables for 11.6- and 5.8-μm OCS bands

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Appl. Opt. 20(9) 1676-1684 (1981)

Comparison of the frequencies of NH₃, CO₂, H₂O, N₂O, CO, and CH₄ as infrared calibration standards

Linda R. Brown and Robert A. Toth
J. Opt. Soc. Am. B 2(5) 842-856 (1985)