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Second harmonic generation of femtosecond laser pulses under Raman-Nath nonlinear diffraction / A. M. Vyunishev [et al.] // Bull. Russ. Acad. Sci. Phys. - 2015. - Vol. 79, Is. 2. - P. 190-193, DOI 10.3103/S106287381502032X. - Cited References: 8. - This work was supported by the Grant of the President of the Russian Federation MK-250.2013.2; by RFBR Grant No 15-02-03838; Krasnoyarsk Regional Fund for Science and Technical Activity Support; and by the Russian Academy of Sciences, Project no. 24.31. A.R. Akhmatkhanov is grateful for the support given to young scientists under the Developmental Program of the Ural Federal University. . - ISSN 1062-8738
Кл.слова (ненормированные):
Diffraction -- Harmonic analysis -- Laser pulses -- Nonlinear optics -- Pulse generators -- Ultrafast lasers -- Ultrashort pulses -- Angular characteristics -- Cherenkov -- Lithium niobate -- Nonlinear diffraction -- Periodic domain structures -- Theoretical modeling -- Harmonic generation
Аннотация: The second harmonic generation of femtosecond laser pulses under Raman-Nath nonlinear diffraction in periodic domain structures of lithium niobate is considered. A theoretical model of Cherenkov nonlinear diffraction is used to calculate the spectral-angular characteristics of the second harmonic generation of femtosecond laser pulses under Raman-Nath nonlinear diffraction. Reliability of the results is confirmed by the experimental data. © 2015, Allerton Press, Inc.

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Публикация на русском языке Генерация второй гармоники фемтосекундных лазерных импульсов в условиях нелинейной дифракции Рамана–Ната [Текст] / А. М. Вьюнышев [и др.] // Изв. РАН. Сер. физич. - 2015. - Т. 79 № 2. - С. 213-216

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of SciencesKrasnoyarsk, Russian Federation
Siberian Federal UniversityKrasnoyarsk, Russian Federation
Ural Federal UniversityEkaterinburg, Russian Federation
OOO LabferEkaterinburg, Russian Federation
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Доп.точки доступа:
Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Sheremet’eva, Y. A.; Nasedkin, B. A.; Baturin, I. S.; Akhmatkhanov, A. R.; Shur, V. Y.
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Vyunishev, A. M.
Cherenkov second harmonic generation of femtosecond laser pulses in a homogeneous nonlinear crystal / A. M. Vyunishev, A. S. Chirkin // Laser Phys. - 2024. - Vol. 34, Is. 8. - Ст. 085402, DOI 10.1088/1555-6611/ad5156. - Cited References: 37 . - ISSN 1054-660X. - ISSN 1555-6611
Кл.слова (ненормированные):
second harmonic generation -- nonlinear diffraction -- nonlinear Cherenkov radiation -- femtosecond laser pulses
Аннотация: In experiments on second harmonic (SH) generation (SHG), a conical structure of radiation has been observed. In the present study, a non-stationary theory of SH excitation of ultrashort laser pulses with phase modulation has been developed, which explains the properties of such a structure as Cherenkov radiation. Under phase-mismatched interactions, a maximum of the SH spectrum is observed at the Cherenkov angle, which is determined by the ratio of the SH and laser radiation phase velocities. It is shown that tightly focused laser beams are preferred to observe Cherenkov SHG. The SH spectral width depends on the group velocity mismatch and is more complicated on the excited radiation spectrum. The SH energy can be proportional to the crystal length or group delay length depending on their ratio. We also demonstrate that a complex angular distribution of spectral components (an angular chirp) appears within the SH cross-section.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Department of Photonics and Laser Technology, Siberian Federal University, Krasnoyarsk 660079, Russia
M.V. Lomonosov Moscow State University, Moscow 119991, Russia

Доп.точки доступа:
Chirkin, A. S.; Вьюнышев, Андрей Михайлович
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