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Spatio-temporal characterization of self-formed hollow light pulses in the pump depletion regime of second harmonic generation |
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| Authors: | D. Majus O. Jedrkiewicz M. Molteni P. Ragazzi P. Di Trapani G. Tamošauskas |
| Affiliation: | 1.Department of Quantum Electronics,Vilnius University,Vilnius,Lithuania;2.CNISM and Università degli Studi dell’Insubria,Como,Italy;3.Dipartimento di Fisica,Università degli studi di Milano,Milano,Italy |
| Abstract: | Depletion of the pump pulse in second harmonic generation (SHG) and its back-regeneration from the second harmonic pulse is a well known process in nonlinear optics. Nevertheless how the pump pulse reshapes as a three-dimensional object in space and time has never been investigated. In this work we apply a three-dimensional mapping technique to record this transformation and we experimentally show the formation of a hollow as well as more complex layered spatio-temporal structures of the fundamental pump pulse in different regimes. The results are compared with numerical simulations. |
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