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| 1 | Single-mode spatiotemporal soliton attractor in multimode GRIN fibers显示文摘Experimental and numerical studies of spatiotemporal femtosecond soliton propagation over up to 1 km spans of parabolic graded-index fibers reveal that initial multimode soliton pulses naturally and irreversibly evolve into a single-mode soliton. This is carried by the fundamental mode of the fiber, which acts as a dynamical attractor of the multimode system for up to the record value(for multimode fibers) of 5600 chromatic dispersion distances.This experimental evidence invalidates the use of variational approaches, which intrinsically require that the initial multimode propagation of a self-imaging soliton is indefinitely maintained. | M.ZITELLI M.FERRARO F.MANGINI S.WABNITZ | 2021 | Photonics Research2021，9，5： | 0 |
| 2 | All-optical regeneration of polarization of a 40 Gbit/s return-to-zero telecommunication signal[Invited]显示文摘We report all-optical regeneration of the state of polarization of a 40 Gbit∕s return-to-zero telecommunication signal.The device discussed here consists of a 6.2-km-long nonzero dispersion-shifted fiber,with low polarization mode dispersion,pumped from the output end by a backward propagating wave coming from either an external continuous source or a reflection of the signal.An initially scrambled signal acquires a degree of polarization close to 100%toward the polarization generator output.All-optical regeneration is confirmed by means of polarization and bit-error-rate measurements as well as real-time observation of the eye diagrams.We show that the physical mechanism underlying the observed four-wave-mixing-based polarization attraction phenomenon can be described in terms of the geometric approach developed for the study of Hamiltonian singularities. | J.Fatome D.Sugny S.Pitois P.Morin M.Guasoni A.Picozzi H.R.Jauslin C.Finot G.Millot S.Wabnitz | 2013 | Photonics Research2013，1，3： | 0 |
| 3 | Multiphoton ionization of standard optical fibers显示文摘Atoms ionization by the simultaneous absorption of multiple photons has found applications in fiber optics,where it leads to unique nonlinear phenomena.To date,studies of the ionization regime have been limited to gas-filled hollow-core fibers.Here,we investigate multiphoton ionization of standard optical fibers,where intense laser pulses ionize the atoms constituting the fiber structure itself,instead of that of the filling gas.We characterize material modifications produced by optical breakdown.Their formation affects laser beam dynamics over hours long temporal scales.The damage features are studied by means of optical microscopy and X-ray microtomography.In the framework of glass photonics,our results pave the way for a novel glass waveguide micromachining technique. | M.FERRARO F.MANGINI Y.SUN M.ZITELLI A.NIANG M.C.CROCCO V.FORMOSO R.G.AGOSTINO R.BARBERI A.D.E LUCA A.TONELLO V.COUDERC S.A.BABIN S.WABNITZ | 2022 | Photonics Research2022，10，6： | 0 |
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