Advanced kinetic model of electron-beam-excited KrF lasers including the vibrational relaxation in KrF*(B) and collisional mixing of KrF*(B,C)

Journal Article · Wed May 01 04:00:00 EDT 1985 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.334590· OSTI ID:5767372

Kannari, F; Obara, M; Fujioka, T

Computer models developed so far on electron-beam-excited KrF(B--X, 248 nm) lasers that include the vibrational relaxation process in the upper lasing B level at the finite rate could not predict the high intrinsic laser efficiency which was experimentally reported. This is attributed to the reduction of the laser extraction efficiency. We have developed a four-level KrF laser model that includes the vibrational relaxation process and also the collisional mixing of the KrF*(B) and the KrF*(C) levels. The collisional quenching rates for KrF*(B,C) that we used and the vibrational relaxation rate were carefully estimated by using the effective spontaneous lifetimes for KrF*(B,C). As a result, the model prediction was in quite good agreement with many experimental results for a saturation behavior of KrF*(B--X) fluorescence, for small-signal gains, for small-signal absorptions, and for intrinsic efficiencies. Estimated rate constants in this model for the vibrational relaxation and the KrF*(B,C) mixing are 4 x 10/sup -11/ and 5 x 10/sup -10/ cm/sup 3//s, respectively, for a two-body collision rate with argon gas.

• Research Organization: Department of Electrical Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223, Japan
• OSTI ID: 5767372
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 57:9; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
COLLISIONS
COMPUTERIZED SIMULATION
EFFICIENCY
ELECTRICAL PUMPING
ELECTROMAGNETIC RADIATION
ELECTRON BEAM PUMPING
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ENERGY LEVELS
EXCIMER LASERS
EXCITED STATES
FLUORESCENCE
FLUORIDES
FLUORINE COMPOUNDS
GAIN
GAS LASERS
HALIDES
HALOGEN COMPOUNDS
KINETICS
KRYPTON COMPOUNDS
KRYPTON FLUORIDES
LASERS
LIFETIME
LUMINESCENCE
MATHEMATICAL MODELS
MIXING
MOLECULE COLLISIONS
POPULATION INVERSION
PUMPING
QUENCHING
RADIATIONS
RARE GAS COMPOUNDS
RELAXATION
SATURATION
SIMULATION
ULTRAVIOLET RADIATION
VIBRATIONAL STATES