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Accurate frequency of the 119 μm methanol laser from tunable far-infrared absorption spectroscopy

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4 Author(s)
Inguscio, M. ; Dipartimento di Sci. Fisiche, Naples Univ., Italy ; Zink, L.R. ; Evenson, K.M. ; Jennings, D.A.

High-accuracy absorption spectroscopy of CH3OH in the far infrared is discussed. In addition to 22 transitions in the ground state, the frequency of the (n, τ, J, K), (0, 1, 16, 8)→(0, 2, 15, 7) transition in the ν5 excited vibrational level, which is responsible for the laser emission at 119 μm, was measured. The measured frequency is 2,522,782.57(10) MHz at zero pressure, with a pressure shift of 6.1(32) kHz/Pa (0.805(420) MHz/torr). An accurate remeasurement of the laser emission frequency has also been performed, and the results are in good agreement

Published in:

Quantum Electronics, IEEE Journal of  (Volume:26 ,  Issue: 3 )