Multiple nonlinear Bragg diffraction of femtosecond laser pulses in a χ2photonic lattice with hexagonal domains
URI (for links/citations):http://iopscience.iop.org/article/10.1088/1612-202X/aaa618/meta
Vyunishev, A. M.
Arkhipkin, V. G.
Baturin, I. S.
Akhmatkhanov, A. R.
Shur, V. Ya.
Chirkin, A. S.
Институт инженерной физики и радиоэлектроники
Базовая кафедра фотоники и лазерных технологий
Journal Name:Laser Physics Letters
Journal Quartile in Scopus:Q1
Journal Quartile in Web of Science:Q2
Bibliographic Citation:Vyunishev, A. M. Multiple nonlinear Bragg diffraction of femtosecond laser pulses in a χ2photonic lattice with hexagonal domains [Текст] / A. M. Vyunishev, V. G. Arkhipkin, I. S. Baturin, A. R. Akhmatkhanov, V. Ya. Shur, A. S. Chirkin // Laser Physics Letters. — 2018. — Т. 15 (№ 4). — С. 045401-1-045401-6
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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