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Numerical Simulation of Thermal Blooming in Atmospheric High Energy Laser Propagation

Author: ChangJinYong
Tutor: HanXiangE
School: Xi'an University of Electronic Science and Technology
Course: Optics
Keywords: High-energy laser Thermal blooming Laser propagation in the atmosphere Numerical Simulation
CLC: TN241
Type: Master's thesis
Year: 2009
Downloads: 127
Quote: 2
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Abstract


With the development of laser technology , the growing role of high-energy laser in the military , civil . Laser atmospheric transmission is a rather complicated process , especially the heat caused by the laser heating of the air corona , when the strong transmission of laser light in the atmosphere , a laser with an atmosphere nonlinear effect occurs , causing a distortion of the light beam , twisting, divergence , impact a beam quality , leading to a strong laser transmission instability limits the atmospheric transmission power . Detailed study of the laser beam through atmospheric transmission law has great significance for the effective application of high-energy laser . This paper introduces the characteristics of intense laser propagation in the atmosphere , starting from the Maxwell equations and hydrodynamic equations detailed derivation of the perturbation equations involving the paraxial wave equation and thermal blooming pressure air density approximation and the calculation of the thermal blooming effect in high-energy laser The power threshold value . A detailed analysis of the paraxial wave equation and isobaric approximation air density perturbation equation numerical algorithms , discrete Fourier transform method for numerical calculation of thermal blooming equation , and on this basis to discuss the impact caused by thermal blooming size factors : laser power , equivalent absorption coefficient, the propagation distance of the lateral wind speed, high-energy laser .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Laser technology, the maser > Laser physics and basic theory
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