Self-compression and controllable guidance of multi-millijoule femtosecond laser pulses |
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Authors: | MD Todorov TP Todorov |
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Institution: | a Faculty of Applied Mathematics and Informatics, Technical University of Sofia, 1000 Sofia, Bulgaria b Integrated Technical College, Technical University of Sofia, 1000 Sofia, Bulgaria c Department of Applied Physics, Technical University of Sofia, 1000 Sofia, Bulgaria |
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Abstract: | Self-compression of multi-millijoule femtosecond laser pulses and dramatic increase of the peak intensity are found in pressurized helium and neon within a range of intensity in which the ionization modification of the material parameters by the pulse is negligible. The pulse propagation is studied by the (3 + 1)-dimensional nonlinear Schrödinger equation including basic lowest order optical processes - diffraction, second order of dispersion, and third order of nonlinearity. Smooth and well controllable pulse propagation dynamics is found. Construction of compressed pulses of controllable parameters at given space target point by a proper chose of the pulse energy and/or gas pressure is predicted. |
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Keywords: | 42 65 Re 42 65 Jx 42 65 Tg |
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