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Multifocus Structur...
Multifocus Structures of Ultrashort Self-Focusing Laser Beam Observed in a Three-Photon Fluorescent Medium
- Article/chapterEnglish2009
Publisher, publication year, extent ...
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Institute of Electrical and Electronics Engineers (IEEE),2009
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:kth-18593
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-18593URI
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https://doi.org/10.1109/jqe.2009.2014850DOI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20100525
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Self-focusing effect and multifocus structures of an ultrashort (similar to 160-fs) pulsed laser beam of similar to 1.3-mu m wavelength are investigated in several organic liquids. The intensity-dependent self-focusing formation and multifocus structures of the infrared (IR) laser beam were directly observed in a three-photon active fluorescent dye solution cell, in which a high contrast image of the spatial structure of the self-focusing beam can be obtained due to the cubic dependence of the fluorescence intensity on the local IR laser intensity. By combining this dye solution cell with another cell filled with various transparent organic liquids, the contributions of these tested liquids to the observed self-focusing effect are elucidated. The numerical simulations for this type of self-focusing behavior are presented, based on the assumption that the major contribution to the observed self-focusing is the nonlinear refractive-index change of the solvent due to electronic-cloud distortion. The simulation results are in fairly good agreement with the experimental results.
Subject headings and genre
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Self-focusing
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multifocus structure
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three-photon excitation
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optical beams
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filament
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pulses
Added entries (persons, corporate bodies, meetings, titles ...)
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Zhang, A. P.
(author)
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Zheng, Q. D.
(author)
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Qin, HaiyanKTH,Teoretisk kemi(Swepub:kth)u1u6dma1
(author)
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Prasad, P. N.
(author)
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He, Sailing
(author)
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Ågren, HansKTH,Teoretisk kemi(Swepub:kth)u1l2s96v
(author)
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KTHTeoretisk kemi
(creator_code:org_t)
Related titles
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In:IEEE Journal of Quantum Electronics: Institute of Electrical and Electronics Engineers (IEEE)45:7, s. 816-8240018-91971558-1713
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