Generation of the second harmonics of Bessel light beams in a KTP crystal
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk (Belarus)
- Inter-branch Institute of advanced training Belorussian Polytechnic academy Minsk-107 (Belarus)
- Division of Optical problems in Informatics, National Academy of Sciences of Belarus, Minsk (Belarus)
- Stock Company 'Solar Laser Systems', Minsk-107 (Belarus)
Theoretical and experimental investigations were made of the characteristic features of doubling the frequency of Bessel light beams by the oe - e interaction in a KTP crystal. All possible and scalar interactions of plane-wave components of Bessel beams were observed experimentally. The spatial structure of the second harmonic in the far zone consisted of a central spot and a concentric ring. The diffraction divergence of the central beam was weak ( {approx} 1.7 mrad). The energy conversion efficiency was {approx} 21% for a Bessel beam, which was three times higher than the efficiency of conversion of the initial laser beam. A theoretical model was based on representation of the field of the second harmonic as a superposition of Bessel beams, which provided a correct description of the observed spatial and energy characteristics of the second harmonic. (nonlinear optical phenomena and devices)
- OSTI ID:
- 21435942
- Journal Information:
- Quantum Electronics (Woodbury, N.Y.), Vol. 28, Issue 11; Other Information: DOI: 10.1070/QE1998v028n11ABEH001375; ISSN 1063-7818
- Country of Publication:
- United States
- Language:
- English
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