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A number of manners to obtain first-order achromatic phase matching of both type I and type II are presented and the most advantageous ones are identified to generate high-spectral quality 100-fs pulses by either parametric generation or frequency up-conversion. In the case of frequency-doubling high-energy 5-fs Ti: sapphire pulses, a non-collinear phase-matching I geometry in a beta-barium borate crystal cut at 44 deg is devised that should allow high conversion efficiency, virtually without pulse lengthening and intra-pulse frequency chirp due to group-velocity dispersion.
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Tom
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16--19
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Bibliogr. 24 poz., rys.
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- Dipartimento di Scienze Chimiche, Fisiche e Matematiche, University of Insubria, Italy
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Bibliografia
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bwmeta1.element.baztech-article-BPS2-0009-0026