Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2014

Идентификатор DOI: 10.1364/OL.39.004231

Ключевые слова: Ultrashort pulses, Group-velocity mismatch, Nonlinear diffraction, Nonlinear photonics, Propagation angle, Raman-Nath diffraction, Second harmonic pulse, Second harmonics, Spectral intensity, Diffraction

Аннотация: We study the nonlinear Raman-Nath diffraction (NRND) of femtosecond laser pulses in a 1D periodic nonlinear photonic structure. The calculated second-harmonic spectra represent frequency combs for different orders of transverse phase matching. These frequency combs are in close analogy with the well-known spectral Maker fringes observed in single crystals. The spectral intensity of the second harmonic experiences a redshift with a propagation angle, which is opposite the case of Cerenkov nonlinear diffraction. We analyze how NRND is affected by the group-velocity mismatch between fundamental and second-harmonic pulses and by the parameters of the structure. Our experimental results prove the theoretical predictions. (C) 2014 Optical Society of America

Журнал: OPTICS LETTERS

Выпуск журнала: Vol. 39, Is. 14

Номера страниц: 4231-4234

ISSN журнала: 01469592

Место издания: WASHINGTON

Издатель: OPTICAL SOC AMER

• Vyunishev A.M. (Siberian Federal University)
• Slabko V.V. (Siberian Federal University)
• Baturin I.S. (Labfer Ltd.)
• Akhmatkhanov A.R. (Labfer Ltd.)
• Shur V.Y. (Labfer Ltd.)

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