Space — time structure of radiation from a high-power fast-flow CO2laser
| Autor: | N E Sarkarov, A. M. Zotov, A. P. Napartovich, A. V. Rodin, V A Gurashvili, S. P. Pavlov, P V Korolenko |
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| Rok vydání: | 2001 |
| Předmět: |
Physics
Diffraction Scattering business.industry Statistical and Nonlinear Physics Near and far field Radiation Laser Electromagnetic radiation Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Computational physics Amplitude Optics law Electrical and Electronic Engineering business Intensity (heat transfer) |
| Zdroj: | Quantum Electronics. 31:821-824 |
| ISSN: | 1468-4799 1063-7818 |
| DOI: | 10.1070/qe2001v031n09abeh002053 |
| Popis: | The space - time structure of radiation from an industrial electric-discharge, flowing CO{sub 2} laser is studied experimentally. For the optimal design of the optical and gas-dynamic sections, a total suppression of high-frequency radiation fluctuations and a lowering of the amplitude of low-frequency fluctuations down to 6% - 10% were observed with increasing output power. At the same time, the intensity distribution in the near-field diffraction zone was complicated and unstable. 'Hot' spots and screw wave-front dislocations were observed in the laser-beam cross section. Numerical simulations showed that the properties of the near-field radiation structure are determined by random caustics and phase singularities formed due to the diffraction transformation of the initial wave-front perturbations. (control of laser radiation parameters) |
| Databáze: | OpenAIRE |
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