ISSN:
1572-9559
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Summary We described a13CH3F Raman laser pumped by a grating tuned 20 atmospheres CO2 laser. The emission characteristics of the13CH3F laser extends from 14 cm−1–35 cm−1 and from 49 cm−1–72 cm−1; about 65% of these frequency ranges can be covered with tunable radiation. The characteristics shows a strong dependence on the rotaional quantum numbers of the states involved in the Raman laser transitions and, within each tuning interval, on the frequency offset with respect to the frequencies of resonant transitions. We obtained, at 51 cm−1, a maximum FIR laser pulse energy of about 800 μJ (at a pump energy of 200 mJ), corresponding to a photon conversion of about 8%. In some cases we have observed simultaneous emission at a Raman and a cascade frequency. In addition, FIR emission power dependence on13CH3F gas pressure and pump pulse power were investigated for different J quantum numbers.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01011493
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