title: Self-phase modulation spectral broadening in two-dimensional spatial solitons: toward three-dimensional spatiotemporal pulse-train solitons.
abstract: 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.
authors.affiliation: Solid State Institute and Physics Department, Technion—Israel Institute of Technology, Haifa 32000, Israel. orenla@tx.technion.ac.il
authors.forename: Oren
authors.initials: O
authors.lastname: Lahav
authors.forename: Hassid
authors.initials: H
authors.lastname: Gurgov
authors.forename: Pavel
authors.initials: P
authors.lastname: Sidorenko
authors.forename: Or
authors.initials: O
authors.lastname: Peleg
authors.forename: Liad
authors.initials: L
authors.lastname: Levi
authors.forename: Avner
authors.initials: A
authors.lastname: Fleischer
authors.forename: Oren
authors.initials: O
authors.lastname: Cohen