CO overtone-transition lasers

Andrei A. Ionin

doi:10.1117/12.414055

25 January 2001 CO overtone-transition lasers

Andrei A. Ionin

Proceedings Volume 4184, XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (2001) https://doi.org/10.1117/12.414055
Event: XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, 2000, Florence, Italy

Abstract

A survey of experimental and theoretical results on physics of a CO laser operating on first-overtone (FO) vibrational transitions V+2?V is presented. A special attention is paid to quite new results recently obtained at the Lebedev Physics Institute (Russia), TRINITI (Russia) and Air Force Research Lab (USA). Efficient multiwavelength pulsed FO CO lasing with output efficiency up to 1 1% and specific output energy up to 50 J/l Amagat is observed within the spectral range of 2.5-4.1 ?m corresponding to the vibrational transitions V+2?V from 6?4 up to 37?35. Single-line frequency tunable FO CO lasing on the wavelengths from ~2.7 up to 4.2 ?m with the maximum output efficiency up to ~1% is also observed. Multiline and single-line lasing on 430 ro-vibrational lines is obtained. Theoretical calculations based on the experimental data predict that multiline FO CO laser efficiency can be enhanced up to 20%. The effect of "spectrum alternation", i.e. an alternation of strong and weak vibrational bands, in pulsed FO CO laser spectrum, which is determined by two sets of cascade transitions, is experimentally observed for the first time. An influence of nitrogen on spectral characteristics of a single-line FO CO laser operating on very high vibrational transitions up to 38?36, which is related to quasy-resonance overlapping of the transition with 0?1 transition of nitrogen molecule, is discussed. High efficiency and high specific output energy places the FO CO laser amongst other high-power lasers such as CO2 laser, fimdamental band CO laser and HF(DF) laser.

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Andrei A. Ionin "CO overtone-transition lasers", Proc. SPIE 4184, XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (25 January 2001); https://doi.org/10.1117/12.414055

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KEYWORDS

Gas lasers

Mirrors

Carbon monoxide

Laser resonators

Molecules

Diffraction gratings

Reflectivity

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