Formation of few-cycle femtosecond pulses by phase compensated spectral broadening in media with alternating cubic nonlinearity sign

Stanislav A. Frolov; Vladimir I. Trunov

doi:10.1117/12.2550572

11 December 2019 Formation of few-cycle femtosecond pulses by phase compensated spectral broadening in media with alternating cubic nonlinearity sign

Stanislav A. Frolov, Vladimir I. Trunov

Author Affiliations +

Proceedings Volume 11322, XIV International Conference on Pulsed Lasers and Laser Applications; 113220U (2019) https://doi.org/10.1117/12.2550572
Event: XIV International Conference on Pulsed Lasers and Laser Applications (AMPL-2019), 2019, Tomsk, Russian Federation

Abstract

Scheme for pulse compression during self-phase modulation in nonlinear media with a different sign of effective cubic nonlinearity is presented and investigated. It is shown that the proposed scheme is the most promising for implementing the regime of compression of powerful pulses to few-cycle ones in the spectral range of 1.55. In this case the maximum energy of compressed pulses is limited by the available aperture of nonlinear optical crystals. In the region of 1.55 μm, when using 5 mm BBO crystals, the achievable duration of compressed pulses is found to be 7.4 fs. The magnitude of the final nonlinear phase shift in the range of compressed beam intensities of 75-100% is more than an order of magnitude lower compared to multi-element spectral broadening schemes based on media with positive cubic nonlinearity. The proposed schemes can also be used to compress pulses in other spectral ranges with an appropriate selection of nonlinear optical crystals.

Citation Download Citation

Stanislav A. Frolov and Vladimir I. Trunov "Formation of few-cycle femtosecond pulses by phase compensated spectral broadening in media with alternating cubic nonlinearity sign", Proc. SPIE 11322, XIV International Conference on Pulsed Lasers and Laser Applications, 113220U (11 December 2019); https://doi.org/10.1117/12.2550572

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