Kinetics of the active medium of a He-Sr{sup +} recombination laser: 2. Achievable energy characteristics

Journal Article · Wed Apr 30 04:00:00 EDT 2008 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2008V038N04ABEH013698· OSTI ID:21466786

Chebotarev, G D; Latush, E L; Fesenko, A A ^[1]

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1. Southern Federal University, Faculty of Physics, Department of Quantum Radiophysics, Rostov-on-Don (Russian Federation)

The mechanisms limiting the improvement of the energy characteristics of He-Sr{sup +} recombination lasers with increasing pressure, active volume, and pulse repetition rate are analysed. It is found that the existence of optimal pressure is related to the cooling rate limitation for electrons at high pressures arising from the heating action of the trailing edge of a current pulse and that the average power saturation with increasing discharge tube diameter and pulse repetition rate occurs due to the formation of radial nonuniformity as well as due to the growth of the electron temperature in the afterglow. Calculations involving a mathematical model showed that the attainable maximum of the linear power is equal to {approx}6.2 W m{sup -1} for self-heating active elements of BeO ceramics and to {approx}7.8 W m{sup -1} with its surface blackened, to {approx}7.7 W m{sup -1} for an independent introduction of the vapour and to {approx}9.4 W m{sup -1} in combination with blackening, to {approx}17 W m{sup -1} for intense forced cooling of the active elements of cylindrical geometry and to {approx}29 W m{sup -1} with active elements of rectangular cross section for a wall dimension ratio of 1:3. We demonstrate the feasibility of raising the output power by {approx}21% in the excitation of the active medium by pulse bursts with a short interpulse separation. (lasers and amplifiers)

• OSTI ID: 21466786
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 4 Vol. 38; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AFTERGLOW
ALKALINE EARTH METAL COMPOUNDS
BERYLLIUM COMPOUNDS
BERYLLIUM OXIDES
CERAMICS
CHALCOGENIDES
CONFIGURATION
COOLING
CYLINDRICAL CONFIGURATION
ELECTRON TEMPERATURE
ELECTRON TUBES
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
GAS DISCHARGE TUBES
GASES
HEATING
KINETICS
LASERS
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PRESSURE RANGE
PRESSURE RANGE MEGA PA
PRESSURE RANGE MEGA PA 10-100
PULSES
REACTION KINETICS
RECOMBINATION
SURFACES
VAPORS