Change of optimum conditions of second harmonic generation of spatial limited laser beams in nonlinear crystals

Frequency doubling of spatially limited laser beams in nonlinear crystals is investigated theoretically. It was shown that the major factor, which reduces the second harmonic generation (SHG) efficiency in this case, is a diaphragm aperture effect, caused by influence of extraordinary polarized lase...

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Bibliographic Details
Published in:Optical and quantum electronics 2003-12, Vol.35 (15), p.1311-1315
Main Authors: SAPAEV, U. K, KULAGIN, I. A, USMANOV, T
Format: Article
Language:English
Subjects:
Exact sciences and technology
Frequency conversion
harmonic generation, including high-order harmonic generation
Fundamental areas of phenomenology (including applications)
Harmonic generation, frequency conversion
Nonlinear optical crystals
Nonlinear optics
Optical materials
Optics
Physics
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Summary:Frequency doubling of spatially limited laser beams in nonlinear crystals is investigated theoretically. It was shown that the major factor, which reduces the second harmonic generation (SHG) efficiency in this case, is a diaphragm aperture effect, caused by influence of extraordinary polarized laser beams. In that case a spatial shift of mutually orthogonally polarized beams of the incident waves relative to each other in perpendicular direction of wave transmission at the entry to crystals lead to increase the efficiency of SHG of limited beams.
ISSN:0306-8919
1572-817X
DOI:10.1023/B:OQEL.0000009398.70142.bc