The Optically Pumped Far-Infrared Laser for Methanol Isotopomers and Acetaldehyde
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Date
1995
Journal Title
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Publisher
Ohio State University
Abstract
The methanol isotopomers have been systematically investigated as a source of far-infrared (FIR) laser emission utilizing a newly designed optically pumped FIR-laser system. The system combines several different FIR laser cavity designs with the extended line coverage available from an efficient $CO_{2}$ laser. Many new FIR laser lines have been observed, pumped by high-J-fundamental, sequence, and hot-band $CO_{2}$ transitions. The observed new FIR laser lines cover a broad spectral region, and contribute significantly to the frequency coverage of the optically pumped FIR laser. Many new short-wavelength FIR laser transitions for normal methanol have been observed using a 2-m-long FIR laser cavity. In addition, acetaldehyde molecule has been reinvestigated as a source of FIR laser media. Accurate heterodyne frequency and $CO_{2}$-laser pump frequency offset measurements have been made for most of new FIR laser lines.
Description
Author Institution: National Institute of the Standards and Technology, Gaithersburg, MD 20899 U.S.A.; National Institute of the Standards and Technology, Boulder, CO 80303 U.S.A.; University of New Brunswick, Fredericton, NB, E3B 5A3, Canada.; University of New Brunswick, Saint John, NB, E2L 4L5, Canada.; UNICAMP, 13083-970 Campinas, SP, Brasil.