In this work, we reveal that when using femtosecond pump pulses, one has access to a different regime, where the peak power inside the MM fiber may reach and even surpass the critical power Pcr for catastrophic self-focusing (this is about 10 MW in fused- silica). When these peak power levels are reached, the propagating light beam undergoes a so-called filamentation phenomenon, leading to the so-called conical emission (CE)]. In our experiments, we report for the first time the formation of a supercontinuum spiral emission (SSE), where the spectral components of the output beam are spatially separated in the far-field emitted at the fiber output.
Observation of supercontinuum spiral emission in optical fibers / Mangini, F.; Ferraro, M.; Zitelli, M.; Niang, A.; Tonello, A.; Couderc, V.; Wabnitz, S.. - 243:(2020), p. 17003. (Intervento presentato al convegno Europhoton 2020 tenutosi a Online only) [10.1051/epjconf/202024317003].
Observation of supercontinuum spiral emission in optical fibers
Mangini, F.;Ferraro, M.;Zitelli, M.;Wabnitz, S.
2020
Abstract
In this work, we reveal that when using femtosecond pump pulses, one has access to a different regime, where the peak power inside the MM fiber may reach and even surpass the critical power Pcr for catastrophic self-focusing (this is about 10 MW in fused- silica). When these peak power levels are reached, the propagating light beam undergoes a so-called filamentation phenomenon, leading to the so-called conical emission (CE)]. In our experiments, we report for the first time the formation of a supercontinuum spiral emission (SSE), where the spectral components of the output beam are spatially separated in the far-field emitted at the fiber output.File | Dimensione | Formato | |
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