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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1987),
  • paper TUR3

Chemical kinetics and photon extraction models for KrF

Open Access Open Access

Abstract

In support of the Los Alamos KrF effort, we developed an improved comprehensive model of chemical kinetics and photon-pulse propagation for KrF excimer laser systems. The computer code couples a table-driven description of the chemical and photon kinetics with a single-mode single-spatial dimension photon propagator. To solve the 2-D (time and propagation axis) photon transport equation in a self-consistent manner, the kinetics, including photons, are explicitly Integrated at multiple axial points (gain sheets), and cavity photon losses. Including output coupling, are treated explicitly, resulting in a true 1-D model. Boundary conditions on the solution allow for the treatment of either flat-flat resonator systems or amplifiers. Spatial variation of the chemical rate equations due to non-uniform pumping or extraction is allowed, and the algorithms have been designed to take advantage of the vector capabilities of the CRAY computer series. Laser pulses are generated from spontaneous emission along the propagation axis or from arbitrary input seed pulses. We present results of comparisons of this model to other analytic (e.g., Rigrod) and computer models.

© 1987 Optical Society of America

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