Effect of molecular additions on the radiation parameters of a laser on Xe atomic transitions

An electron-beam-pumped laser on Xe atomic transitions is experimentally investigated at various pump durations and powers within wide ranges of pressures and working mixtures including additions of molecular gases. It is shown that the maximum specific lasing powers are achieved at high specific pu...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2002-05, Vol.32 (5), p.449-454
Main Authors: Fedenev, A V, Tarasenko, Viktor F, Skakun, V S
Format: Article
Language:English
Subjects:
ARGON
ATOMIC AND MOLECULAR PHYSICS
BEAM CURRENTS
BEAMS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CURRENTS
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELEMENTS
FLUIDS
GASES
LASER RADIATION
LASERS
LEPTON BEAMS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE BEAMS
POWER DENSITY
PRESSURE RANGE
PRESSURE RANGE MEGA PA
PRESSURE RANGE MEGA PA 10-100
PULSES
PUMPING
RADIATIONS
RARE GASES
XENON
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Summary:An electron-beam-pumped laser on Xe atomic transitions is experimentally investigated at various pump durations and powers within wide ranges of pressures and working mixtures including additions of molecular gases. It is shown that the maximum specific lasing powers are achieved at high specific pump powers (above 200 kW cm{sup -3} atm{sup -1}) and durations of the beam current pulse of tens of nanoseconds in high-pressure Ar - Xe mixtures with molecular gas additions (N{sub 2} and CO{sub 2}). A specific output radiation power of {approx} 4 kW cm{sup -3} is obtained. For a pump pulse durations from hundreds of nanoseconds to 1 {mu}s, the highest lasing energies are reached without molecular additions at a comparatively low beam-current density (the specific pump power is {approx} 10 kW cm{sup -3} atm{sup -1}). However, in setups with specific pump powers above 40 kW cm{sup -3} atm{sup -1} and a working-mixture pressure limited by the strength of the laser chamber, molecular additions result in an increase in the radiation energy and efficiency. In wide-aperture facilities with high pump powers, molecular additions improve the distribution of the radiation power density over the laser-beam cross section. (control of laser radiation parameters)
ISSN:1063-7818
1468-4799
DOI:10.1070/QE2002v032n05ABEH002217