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Updated: Jun 14, 2026

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
Published on: December 18, 2015
Heterodyne frequency measurements of (13)CO(2) laser hot band transitions
Abstract:
The frequencies of twenty-eight lines in the P-branch of the 01(1)1-[11(1)0,03(1)0](I) band of (13)C(16)O(2), observed in laser emission, and three lines in the R-branch, observed in absorption with a diode laser, have been carefully measured with stabilized CO(2) lasers. A significant improvement in the ro-vibrational constants has been obtained from a least squares fit to these data. The laser lines stabilized by saturated absorption techniques provide convenient, accurate (uncertainty <0.1 MHz) frequency references near 11.7 microm.
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