Thermal distortions of focused laser beams in the atmosphere

Parametric Analysis of Thermal Blooming for High Energy Lasers Considering the Atmospheric Environment

“…The depicted model presented in this section is developed using the paraxial approximation of propagation along z axis under isobaric condition. The heating effects behavior in the atmosphere, considering a complex amplitude electric field and the thermal interaction of electromagnetic wave with air is described using the following differential equations [9]:…”

“…To solve this equation set, normalization [9] is applied to the variables by making E = E/E 0 , E 0 = 8πI 0 /(cn), x = x/a, y = y/a, z = z/ka…”

“…6and 7, the values of E, T , I and f (x, y) are set to numerical values and boundary conditions are defined by Eq (4) and (5). According to procedure described by Konyaev et al [9], the system is split using the second order approximation with respect to z. In this system, t is set as a fixed variable.…”

Parametric Analysis of Thermal Blooming for High Energy Lasers Considering the Atmospheric Environment

“…Many studies focusing on thermal blooming have been published regarding thermal blooming modeling [9]- [11]. However, these reported results are nor directly reproducible since they do not present all simulation variables considered in their models.…”

Self-focusing of laser beam in dispersed medium

“…Usually such self-action phenomena accompany the propagation of short powerful laser pulses [1][2][3] where due to high density of the absorbed energy the medium may be damaged. This is detrimental, for example, in the study of organic and biological objects or could serve as a basis for investigations of thermal distortions of focused laser beam in the atmosphere 4 and in the field of image correction 5,6 .…”