Characterization of new FIR laser lines from CD sub(3)-rocking and asymmetric CD sub(3) deformation modes of super(13)CD sub(3 )OD

In this paper, we report new optically pumped far-infrared (FIR) laser lines from the in-plane CD sub(3)-rocking and asymmetric CD sub(3) deformation absorption vibrational bands of super(13)CD sub(3)OD. A waveguide CO sub(2) laser of wide tunability (290 MHz) was used as the pump source, and a Fabry-Perot open cavity as the FIR laser resonator. Optoacoustic absorption spectrum was used as a guide to search for new FIR laser lines. We could observe 13 new laser lines in the range 103-491 mu m. The lines were characterized according to wavelength, relative polarization, relative intensity, and optimum working pressure. The transferred lamb-dip technique was used to measure the frequency absorption transition for both new and previously reported laser lines