Nonlinear pulse self-compression in normal dispersion regime in KTiOPO4

Valdas Pasiskevicius; Christoffer Krook; Anne-Lise Viotti; Björn Hessmo; Fredrik Laurell

doi:10.1117/12.2613648

1 April 2022 Nonlinear pulse self-compression in normal dispersion regime in KTiOPO₄

Valdas Pasiskevicius, Christoffer Krook, Anne-Lise Viotti, Björn Hessmo, Fredrik Laurell

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Proceedings Volume PC11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI; PC119850H (2022) https://doi.org/10.1117/12.2613648
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

Yb:KYW laser pulses at 1030 nm were frequency-broadened and compressed by single-pass propagation in a 12 mm single-domain KTP crystal. The compression mechanism relies on refractive index modulation by the polariton shock-wave generated by impulse excitation of the lattice vibration modes, with a large dipole moment parallel to the crystal polar axis. Coherent Stokes sidebands generated by the index modulation lead to pulse compression under normal dispersion conditions. A compression ratio of about eight times was obtained for 170fs-long Yb:KYW laser pulses.

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Citation Download Citation

Valdas Pasiskevicius, Christoffer Krook, Anne-Lise Viotti, Björn Hessmo, and Fredrik Laurell "Nonlinear pulse self-compression in normal dispersion regime in KTiOPO₄", Proc. SPIE PC11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI, PC119850H (1 April 2022); https://doi.org/10.1117/12.2613648

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KEYWORDS

Laser crystals

Crystals

Ferroelectric materials

Modulation

Polaritons

Nonlinear crystals

Polarization

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