Theory of noncollinear frequency doubling of transform limited pulses in non-steady-state regime

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.1364/JOSAB.33.002308

Ключевые слова: Band structure, Frequency doublers, Gaussian beams, Nonlinear optics, Phase matching, Analytical expressions, Frequency-doubling, Interaction geometries, Intersection angles, Parametric interactions, Phase matching conditions, Spectral bandwidth, Transform-limited pulse, Harmonic generation

Аннотация: Noncollinear second-harmonic generation from two ultrashort pulses intersecting in a nonlinear medium is studied in spectral and time domains. We derive analytical expressions for the second-harmonic (SH) amplitude in crystals of finite thickness neglecting diffraction. The contribution from characteristics of the fundamental radiation and interaction geometry to the process is analyzed. In addition, refined phase-matching conditions are obtained. We find that the spectral bandwidth is determined by the intersection angle and can be enlarged. The SH pulse duration can be optimized by varying the fundamental beam size and the intersection angle. It is found that the SH beam excited by a Gaussian fundamental beam becomes elliptical. It is shown that the fundamental pulse duration can be readily characterized with single pulses by means of measuring the ellipticity of the SH beam profile. The approach developed can potentially be used to calculate parametric interactions of fundamental pulses with an arbitrary spectrum. (C) 2016 Optical Society of America

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Выпуск журнала: Vol. 33, Is. 11

Номера страниц: 2308-2312

ISSN журнала: 07403224

Место издания: WASHINGTON



  • Vyunishev Andrey M. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660079, Russia)
  • Arkhipkin Vasily G. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660079, Russia)
  • Chirkin Anatoly S. (Moscow MV Lomonosov State Univ, Fac Phys & Int Laser Ctr, Moscow 119992, Russia)

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