/sup 13/CD/sub 3/OD optically pumped by a waveguide CO/sub 2/ laser: new FIR laser lines

Abstract

A waveguide CO/sub 2/ laser of wide tunability was used to pump infrared transitions of the /sup 13/CD/sub 3/OD C-O stretching vibrational mode. The optoacoustic signal associated with the absorbing transitions served as a guide to search for new laser lines. We could observe 36 new far-infrared laser lines ranging from 57 to 1192 /spl mu/m. All lines were characterized in wavelength, relative polarization, intensity, optimum pressure of operation, and precise offset measurements.