Abstract

A carbon dioxide laser has been coupled with a tunable diode laser spectrometer for heterodyne calibration of molecular spectra. The output of the diode laser is measured to be 10–15 MHz wide and is stable to within ±2 MHz. The frequency of the 2sQ(1,1) transition in the 2ν2ν2 band of ammonia is measured to be 949.44746(24) cm−1.

© 1979 Optical Society of America

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