Abstract

We experimentally study filamentation and supercontinuum generation in a birefringent medium [beta-barium borate (β-BBO) crystal] pumped by intense 90 fs, 1.8 μm laser pulses whose carrier wavelength falls in the range of anomalous group velocity dispersion of the crystal. We demonstrate that the competition between the intrinsic cubic and cascaded-quadratic nonlinearities may serve as a useful tool for controlling the self-action effects via phase matching condition. In particular, we found that spectral superbroadening of the ordinary polarization is linked to three-dimensional self-focusing and formation of self-compressed spatiotemporal light bullets that could be accessed within a certain range of either positive or negative phase mismatch. In the extraordinary polarization, we detect giant spectral shifts of the second harmonic radiation, which are attributed to a light bullet-induced self-phase matching.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Second-order cascading-assisted filamentation and controllable supercontinuum generation in birefringent crystals

Rosvaldas Šuminas, Gintaras Tamošauskas, Vytautas Jukna, Arnaud Couairon, and Audrius Dubietis
Opt. Express 25(6) 6746-6756 (2017)

Carrier-envelope phase-stable spatiotemporal light bullets

I. Gražulevičiūtė, R. Šuminas, G. Tamošauskas, A. Couairon, and A. Dubietis
Opt. Lett. 40(16) 3719-3722 (2015)

The anisotropic Kerr nonlinear refractive index of the beta-barium borate (β-BaB2O4) nonlinear crystal

Morten Bache, Hairun Guo, Binbin Zhou, and Xianglong Zeng
Opt. Mater. Express 3(3) 357-382 (2013)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription