Time-resolved spatial structure of TEA CO_2 laser pulses
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2000
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Kluwer Academic Publishers
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Abstract
The evolution of the intensity profile of TEA CO_2 laser pulses along the pulse length is investigated both analytically and experimentally. A simple scalar model of the pulse amplitude is introduced, which gives the loaded-cavity modes as a linear combination of bidimensional Hermite-Gauss functions. According to this model a number of equations are derived which link the time-varying spatial structure of the pulse to its time-resolved second-order intensity moments, namely, the beam width and the M^2 parameter.
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© Kluwer Academic Publishers.
The research work leading to this paper has been supported by the Comisión Interministerial de Ciencia y Tecnología of Spain, under Project PB97-0295, within the framework of EU-1269 Eureka Project.