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Вид документа : Статья из журнала
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Автор(ы) : Vyunishev A. M., Arkhipkin V. G., Baturin I. S., Akhmatkhanov A. R., Shur, V. Ya, Chirkin A. S.
Заглавие : Multiple nonlinear Bragg diffraction of femtosecond laser pulses in a χ(2) photonic lattice with hexagonal domains
Коллективы : Russian Foundation for Basic Research [15-02-03838]; Government of the Russian Federation (Act 211) [02.A03.21.0006]
Место публикации : Laser Phys. Lett. - 2018. - Vol. 15, Is. 4. - Ст.045401. - ISSN 1612-2011, DOI 10.1088/1612-202X/aaa618. - ISSN 1612-202X(eISSN)
Примечания : Cited References:26. - The work was supported by the Russian Foundation for Basic Research through grant 15-02-03838. ISB, ARA and VYS acknowledge the support of the Government of the Russian Federation (Act 211, Agreement 02.A03.21.0006).
Предметные рубрики: RAMAN-NATH DIFFRACTION
STRUCTURED FUNDAMENTAL WAVE
2ND-HARMONIC
Ключевые слова (''Своб.индексиров.''): nonlinear bragg diffraction--nonlinear photonic lattice--second harmonic--generation--femtosecond pulses
Аннотация: The frequency doubling of femtosecond laser pulses in a two-dimensional (2D) rectangular nonlinear photonic lattice with hexagonal domains is studied experimentally and theoretically. The broad fundamental spectrum enables frequency conversion under nonlinear Bragg diffraction for a series of transverse orders at a fixed longitudinal quasi-phase-matching order. The consistent nonstationary theory of the frequency doubling of femtosecond laser pulses is developed using the representation based on the reciprocal lattice of the structure. The calculated spatial distribution of the second-harmonic spectral intensity agrees well with the experimental data. The condition for multiple nonlinear Bragg diffraction in a 2D nonlinear photonic lattice is offered. The hexagonal shape of the domains contributes to multibeam second harmonic excitation. The maximum conversion efficiency for a series of transverse orders in the range 0.01%-0.03% is obtained.
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