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GENERATION CHARACTERISTICS OF SMALL–SIZED ТЕА–СО2 LASER AT TEMPERATURES ATCOOLING UP TO –28 0С

Do Quang Manh, post–graduate student, RSREU, Ryazan; This email address is being protected from spambots. You need JavaScript enabled to view it.
B. A. Kozlov, Dr. in physics and mathematical sciences, professor of Electronic Devices Dept RSREU; This email address is being protected from spambots. You need JavaScript enabled to view it.

Influence of temperature of active medium on small–sized TEA–CO2 laser generation characteristics in range –28 0С ÷ +60 0С are studied. Variation of active medium temperature in range –28 0С ÷ +60 0С lead to decrease of laser radiation energy from 45 ÷ 60 mJ to some mJ (depending on initial gas composition). Substitution of helium in CO2:N2:He mixtures on hydrogen leads to the increase of laser radiation energy in 1,4 ÷ 1,8 times, but gas composition with hydrogen doesn’t provide long–time work of small –sized ТЕА-СО2 laser in sealed–off regime. Maximum laser radiation peak power up to 1,5 ÷ 2 MW is achieved at pulse duration up to 25 nanoseconds. The main aim of this work is to study experimentally the influence of active medium temperature on small–sized TEA–CO2 laser generation characteristics in range –28 0С ÷ +60 0С.

Key words: small–sized sealed–off TEA–CO2 laser, generation characteristics, pumping efficiency, temperature regime of laser active element, laser radiation pulse parameters, laser radiation energy in pulse, pulse radiation duration, pulse power.

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