Control of pulse length of a photoinitiated HF/DF chemical laser in a range from several nanoseconds up to a millisecond

Boris Sergeevitch Alexandrov; A. V. Arsenjev; Michail A. Azarov; V. A. Drozdov; Georgiy A. Troshchinenko

doi:10.1117/12.335850

5 January 1999 Control of pulse length of a photoinitiated HF/DF chemical laser in a range from several nanoseconds up to a millisecond

Boris Sergeevitch Alexandrov, A. V. Arsenjev, Michail A. Azarov, V. A. Drozdov, Georgiy A. Troshchinenko

Author Affiliations +

Proceedings Volume 3686, Laser Optics '98: Gas, Liquid, and Free-Electron Lasers; (1999) https://doi.org/10.1117/12.335850
Event: Laser Optics '98, 1998, St. Petersburg, Russian Federation

Abstract

As a result of the theoretical research the possibility to control the laser pulse length of the chemical HF/DF laser in a range from the part up to some hundreds of microseconds by means of the variation of the laser medium density and the photoinitiation intensity by two orders of magnitude is shown. At that the specific energy characteristics of the active medium does not change essentially because of the variation of the chemical chain length under necessary condition of using the high-quality optical resonator. The calculations have shown that the specific output energy varies from 100 up to 300 J/g and the physical efficiency from 2,000 up to 18,000%. The laser pulses with length from 2 up to 45 microsecond(s) are obtained in experiment for HF and DF laser with the technical efficiency of 10 - 50%, the pulse energy from 2.6 down to 0.1 kJ, the specific energy from 88 J/g (50 J/l) down to 10 J/g (2 J/l) without the fulfillment of the complete optimization. In experiment the mode of the high frequency radiation pulsation is registered with the length of a separate peak lesser than 10 ns and the period equal to the double time of the photon pass through the resonator.

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Boris Sergeevitch Alexandrov, A. V. Arsenjev, Michail A. Azarov, V. A. Drozdov, and Georgiy A. Troshchinenko "Control of pulse length of a photoinitiated HF/DF chemical laser in a range from several nanoseconds up to a millisecond", Proc. SPIE 3686, Laser Optics '98: Gas, Liquid, and Free-Electron Lasers, (5 January 1999); https://doi.org/10.1117/12.335850

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