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Updated: May 15, 2026

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
Published on: December 15, 2021
Self-phase modulation spectral broadening in two-dimensional spatial solitons: toward three-dimensional
Oren Lahav1, Hassid Gurgov, Pavel Sidorenko
1Solid State Institute and Physics Department, Technion—Israel Institute of Technology, Haifa 32000, Israel. orenla@tx.technion.ac.il
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.
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