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Author Jurdik, E. ♦ Petukhov, A. V. ♦ Anema, A. ♦ van Etteger, A. ♦ Rasing, Th.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CHROMIUM ♦ DIFFRACTION ♦ HEATING ♦ IMPURITIES ♦ LASERS ♦ MODULATION ♦ ORIGIN ♦ PHYSICS ♦ POLARIZATION ♦ PROBES ♦ REFRACTIVE INDEX
Abstract The presence of chromium impurities in the crystal matrix of chromium-doped KTiOPO{sub 4} is shown to be at the origin of a strong cubic optical nonlinearity of this material. As a result, a pronounced self-phase modulation of a Gaussian laser beam at 532 nm is observed in the far field as a diffraction pattern consisting of alternating dark and bright rings. The induced nonparabolic and polarization sensitive refractive index change is also used to modulate a weak probe laser beam at 633 nm. A simple theoretical model incorporating a laser heating process and a thermo-optical effect accounts for the main features observed in our experiments and elucidates the mechanisms leading to the diffraction pattern formation. {copyright} 2001 American Institute of Physics.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-08-15
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 90
Issue Number 4


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