21 December 2001 Finite-difference time-domain modeling of laser beam propagation and scattering in dielectric materials
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Abstract
Modified finite-difference time-domain (FDTD) approach to numerical investigation of propagation of laser pulses and beams in transparent materials is presented. In contrary to traditional FDTD technique, it is based on description of wave propagation by wave equation. To take into account important material properties, presented approach can include integrating of a set of coupled nonlinear equations including equations describing dispersion of linear and nonlinear parts of refractive index, linear and two-photon absorption. Developed technique is illustrated with several examples including scattering of laser radiation by diffraction grating (sine relief) and focusing by a dielectric cylinder. There are discussed problems of calculation stability, control of errors, decreasing of required computation time and memory. Application of developed approach to modeling of micro-optical elements for modern areas of optoelectronics is considered.
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Vitali E. Gruzdev, Vitali E. Gruzdev, Anastasia S. Gruzdeva, Anastasia S. Gruzdeva, } "Finite-difference time-domain modeling of laser beam propagation and scattering in dielectric materials", Proc. SPIE 4436, Wave-Optical Systems Engineering, (21 December 2001); doi: 10.1117/12.451307; https://doi.org/10.1117/12.451307
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