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Longitudinally thickness-controlled nanofilms on exposed core fibres enabling spectrally flattened supercontinuum generation

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Light(Advanced Manufacturing) 2021年第3期2卷 76-87页

作者： Tilman A.KLühder henrik schneidewind Erik P.Schartner Heike Ebendorff-Heidepriem Markus A.Schmidt Leibniz Institute of Photonic Technology Albert-Einstein-Str.907745 JenaGermany School of Physical Sciences and ARC Centre of Excellence for Nanoscale BioPhotonics(CNBP)and Institute for Photonics and Advanced Sensing(IPAS) The University of AdelaideAdelaide SA 5005Australia Otto Schott Institute of Material Research Fraunhoferstr.607743 JenaGermany Abbe School of Photonics and Physics Faculty Friedrich Schiller University07743 JenaGermany

Nonlinear frequency conversion is a pathway to unlock undiscovered physics and implement tailored light sources for spectroscopy or medicine.A key challenge is the establishment of spectrally flat outputs,which is particularly demanding in the context of soliton-based light conversion at low pump ***,we introduce the concept of controlling nonlinear frequency conversion by longitudinally varying resonances,allowing the shaping of soliton dynamics and achieving broadband spectra with substantial spectral *** varying resonances are realised by nanofilms with gradually changing thicknesses located on the core of an advanced microstructured *** with engineered thickness profiles are fabricated by tilted deposition,representing a waveguidecompatible approach to nano-fabrication,and inducing well-controlled resonances into the system,allowing unique dispersion control along the fibre *** features and dependencies are examined experimentally,showing improved bandwidth and spectral flatness via multiple dispersive wave generation and dispersionassisted soliton Raman shifts while maintaining excellent pulse-to-pulse stability and coherence in simulations,suggesting the relevance of our findings for basic science as well as tailored light sources.

关键词： waveguide pump soliton

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