Self-phase modulation spectral broadening in two-dimensional spatial solitons: toward three-dimensional spatiotemporal pulse-train solitons

We demonstrate self-phase modulation (SPM) spectral broadening in two-dimensional solitons in homogeneous media using two different schemes. In the active mode, a train of pulses are collectively trapped and form a spatial soliton through a photorefractive, slowly responding, and electronically cont...

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Bibliographic Details
Published in:Optics letters 2012-12, Vol.37 (24), p.5196-5198
Main Authors: Lahav, Oren, Gurgov, Hassid, Sidorenko, Pavel, Peleg, Or, Levi, Liad, Fleischer, Avner, Cohen, Oren
Format: Article
Language:English
Subjects:
Beams (radiation)
Modulation
Nonlinearity
Solitons
Spectra
Three dimensional
Trains
Two dimensional
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Summary:We demonstrate self-phase modulation (SPM) spectral broadening in two-dimensional solitons in homogeneous media using two different schemes. In the active mode, a train of pulses are collectively trapped and form a spatial soliton through a photorefractive, slowly responding, and electronically controlled self-focusing nonlinearity, and each pulse experiences spectral broadening by the fast SPM nonlinearity. In the passive mode, the pulse-train beam is guided in a waveguide that is optically induced by a continuous-wave thermal spatial soliton. The soliton formation increased the normalized spectral broadening factor from 0.5% up to 197%. This experiment presents significant progress toward the experimental demonstration of three-dimensional spatiotemporal pulse-train solitons.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.37.005196