najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2015-6-2-244-248najo-928Research ArticlePAPERS, PRESENTED AT THE CONFERENCEPAPERS, PRESENTED AT THE CONFERENCEFemtosecond pulse shaping via engineered nonlinear photonic crystalsSapaevU. K.

Department of Physics

100174 Tashkent

usapaev@gmail.comEshniyazovV. E.

Department of Physics

100174 Tashkent

EshchanovB. Kh.

Department of Physics

100174 Tashkent

YusupovD. B.

Universitetskaya ul. 2 Tashkent, 100095

National University of Uzbekistan, named after M. UlugbekUzbekistanTashkent State Technical UniversityUzbekistan20151408202562244248Copyright © Sapaev U.K., Eshniyazov V.E., Eshchanov B.K., Yusupov D.B., 20252025Sapaev U.K., Eshniyazov V.E., Eshchanov B.K., Yusupov D.B.Sapaev U.K., Eshniyazov V.E., Eshchanov B.K., Yusupov D.B.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/928

Non-stationary second harmonic generation by femtosecond pulses, taking into account both group velocity mismatch and dispersion in nonlinear photonic crystals (quasi-phase matched crystals) with domains of arbitrary sizes has been studied numerically. A simulated-annealing algorithm, working on the basis of numerical calculation, is developed to design quasi-phase matching gratings which can yield the desired amplitude and phase profile for second-harmonic pulses in the presence of pump depletion.

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The authors declare that there are no conflicts of interest present.