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New Terahertz Laser Lines From ^{13}{\hbox {CD}}_{3}{\hbox {OH}} Pumped by Regular and Hot Bands {\hbox {CO}}_{2} Laser

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5 Author(s)

We have used our new pulsed CO2 laser, operating both on regular and hot bands, to excite the 13CD3OH methanol isotopomer. This has lead to the observation of 13 new high-threshold far-infrared laser emissions (also identified as terahertz laser lines), with frequencies in the range between 24.11 and 102.56 cm-1 (0.72-3.07 THz). The absorption transitions leading to these new FIR laser emissions have been located by observing the optoacoustic absorption spectra around the CO2 emissions. Here, we present these new far-infrared laser lines, characterized in wavelength, polarization, offset relative to the center of the pumping CO2 laser transition, relative intensity, and optimum operation pressure.

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Quantum Electronics, IEEE Journal of  (Volume:44 ,  Issue: 11 )