Laser Pulse Shortening via Zero-Dispersion Phase Matching of Parametric Raman Interactions in Crystals
Sergei N. Smetanin,
Michal Jelínek,
Dmitry P. Tereshchenko,
Mikhail N. Ershkov,
Václav Kubeček
Affiliations
Sergei N. Smetanin
Research Center for Laser Materials and Technologies, Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilova 38, 119991 Moscow, Russia
Michal Jelínek
Department of Physical Electronics, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 11519 Prague, Czech Republic
Dmitry P. Tereshchenko
Research Center for Laser Materials and Technologies, Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilova 38, 119991 Moscow, Russia
Mikhail N. Ershkov
Department of Laser Physics and Technologies, V. A. Degtyarev Kovrov State Technological Academy, Mayakovskogo 19, 601910 Kovrov, Russia
Václav Kubeček
Department of Physical Electronics, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 11519 Prague, Czech Republic
We propose and study the conditions of zero-dispersion phase matching for parametric Raman interactions in birefringent crystals differing by anisotropy of zero-dispersion wavelength and allowing for the spectral tuning of the zero-dispersion phase-matching condition. We choose a highly birefringent crystal of calcite having a wide zero-dispersion anisotropy range for the demonstration of new effects of laser pulse shortening in parametric Raman lasers with spectrally tunable zero-dispersion phase matching. We demonstrate the anti-Stokes (1168 nm) and multi-Stokes (1629 nm) picosecond pulse shortening and self-separation of single 80-ps ultra-short pulse from the zero-dispersion phase-matched parametric Raman lasers that are based on the calcite crystal without using any electro-optical device.
