Modeling of laser heating GaAs considering the effects of atmospheric thermal blooming with crosswind

In this paper, a two-dimensional (2-D) modeling for temperature of GaAs irradiated by laser considering the effects of atmospheric thermal blooming with crosswind is presented. By using analytical expression of distorted laser intensity for the atmosphere thermal blooming with crosswind, the theoretical 2-D plane heat transfer model of laser irradiating GaAs after the action of atmosphere thermal blooming is established. Integral transform method is used to solve the heat transfer equation and its analytical solutions are obtained. The effects of thermal blooming on temperature distributions of GaAs are studied. Results show that the crosswind and the laser propagation distance have obvious influences on the thermal blooming, thereby affecting the temperature distributions of GaAs induced by distorted laser. The smaller the crosswind velocity is, the stronger the thermal blooming is, which leads to a higher distortion of temperature distributions. On the other hand, the farther the laser propagation distance in atmosphere is, the stronger the thermal blooming is, which also leads to the higher distortion of temperature distributions.