HIGH-FREQUENCY FAR-INFRARED LASER LINES OF OPTICALLY PUMPED $CH_{3}OH$
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Date
1995
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Publisher
Ohio State University
Abstract
We have measured 12 far-infrared laser frequencies of optically pumped CH3OH, 6 of which are new lines. The frequencies range from 2.8 to 11.4 THz, with ten lines having frequencies higher than 7 THz. Two frequency stabilized $CO_{2}$ lasers were used as standards for the heterodyne measurements. The frequency of the $26.4 \mum line at 11.4 THz is the highest ever measured with this technique. The lines were generated in a high-frequency far-infrared Fabry-Perot laser cavity pumped by a $CO_{2}$ laser. The cavity has a high Q for wavelengths below $150 \mum$, and uses variable coupling to optimize the cavity for each line.
Description
Author Institution: National Institute of Standards and Technology, 325, Broadway Boulder CO 80303-3328 USA; UNICAMP, 13083-970 Campinas, SP, Brazil