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Title: Phase matching and frequency-noncritical interactions upon frequency conversion of femtosecond pulses

Abstract

The phase-matching properties of biaxial nonlinear crystals providing the highly efficient frequency doubling of femtosecond pulses are analysed. The investigation method is based on the separation of the phase-matching condition and frequency-noncritical interaction. (nonlinear optical phenomena)

Authors:
 [1];  [2]
  1. Scientific-Research Institute of Radioelectronics and Laser Technology at the N.E. Bauman Moscow State Technical University, Moscow (Russian Federation)
  2. Department of Physics, M.V. Lomonosov Moscow State University, Moscow (Russian Federation)
Publication Date:
OSTI Identifier:
21456833
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 36; Journal Issue: 1; Other Information: DOI: 10.1070/QE2006v036n01ABEH013102
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CRYSTALS; FREQUENCY CONVERTERS; INTERACTIONS; NONLINEAR PROBLEMS; PULSES

Citation Formats

Grechin, Sergei G, and Grechin, Sergey S. Phase matching and frequency-noncritical interactions upon frequency conversion of femtosecond pulses. United States: N. p., 2006. Web. doi:10.1070/QE2006V036N01ABEH013102.
Grechin, Sergei G, & Grechin, Sergey S. Phase matching and frequency-noncritical interactions upon frequency conversion of femtosecond pulses. United States. doi:10.1070/QE2006V036N01ABEH013102.
Grechin, Sergei G, and Grechin, Sergey S. Tue . "Phase matching and frequency-noncritical interactions upon frequency conversion of femtosecond pulses". United States. doi:10.1070/QE2006V036N01ABEH013102.
@article{osti_21456833,
title = {Phase matching and frequency-noncritical interactions upon frequency conversion of femtosecond pulses},
author = {Grechin, Sergei G and Grechin, Sergey S},
abstractNote = {The phase-matching properties of biaxial nonlinear crystals providing the highly efficient frequency doubling of femtosecond pulses are analysed. The investigation method is based on the separation of the phase-matching condition and frequency-noncritical interaction. (nonlinear optical phenomena)},
doi = {10.1070/QE2006V036N01ABEH013102},
journal = {Quantum Electronics (Woodbury, N.Y.)},
number = 1,
volume = 36,
place = {United States},
year = {Tue Jan 31 00:00:00 EST 2006},
month = {Tue Jan 31 00:00:00 EST 2006}
}
  • The existence of temperature-noncritical phase matching in second-harmonic generation was discovered for the first time theoretically and confirmed experimentally. A temperature phase-matching bandwidth in excess of 200{sup 0}C was found experimentally for a potassium titanyl phosphate (KTP) crystal of 7.7 mm length at the fundamental-radiation wavelength 1064.2 nm. (letters to the editor)
  • In this paper, a scheme is proposed by which the phase matching bandwidth can be increased by adjusting higher order terms in frequency shift in the phase matching condition. This is achieved by introducing a spectral angular dispersion so that the different spectral components propagate at their phase matching angles. This is equivalent to canceling the group velocity mismatch. The equations describing the requirements on the angular dispersion are discussed and applied to the particular case of type I phase matching. A possible experimental setup is shown that would meet all the conditions required.
  • The nonlinear optical properties of sodium doped potassium titanate phosphate crystal are discussed. (AIP) {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
  • Efficient frequency conversion of femtosecond pulses of a Cr:forsterite laser in tapered fibres is experimentally demonstrated. Unamplified 30-fs Cr:forsterite-laser pulses are used to generate the third harmonic in the phase-matching regime. Propagation of 75-fs, 10-200-nJ Cr:forsterite-laser pulses through a tapered fibre in the range of anomalous dispersion is accompanied by multiply phase-matched cascaded four-wave mixing, giving rise to a manifold of new spectral components in the visible range and substantial spectral broadening within the wavelength range from 1300 to 1600 nm. (control of laser radiation parameters)
  • We consider different mechanisms of nonlinear frequency up-conversion of femtosecond pulses emitted by an erbium fibre system ({lambda} = 1.5 {mu}m) to the range of 0.8 - 1.2 {mu}m in nonlinear silica fibres. The generation efficiency and the centre frequencies of dispersive waves are found as functions of the parameters of the fibre and the input pulse. Simple analytical estimates are obtained for the spectral distribution of the intensity and the frequency shift of a wave packet in the region of normal dispersion during the emission of a high-order soliton under phase matching conditions. In the geometrical optics approximation themore » frequency shifts are estimated in the interaction of dispersive waves with solitons in various regimes. (extreme light fields and their applications)« less