A simple technique to overcome self-focusing, filamentation, supercontinuum generation, aberrations, depth dependence and waveguide interface roughness using fs laser processing

Abstract Several detrimental effects limit the use of ultrafast lasers in multi-photon processing and the direct manufacture of integrated photonics devices, not least, dispersion, aberrations, depth dependence, undesirable ablation at a surface, limited depth of writing, nonlinear optical effects s...

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Autores principales:	Jerome Lapointe, Raman Kashyap
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/587fd6595a1d424da5c23820d5ba1ee0
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spelling	oai:doaj.org-article:587fd6595a1d424da5c23820d5ba1ee02021-12-02T12:32:15ZA simple technique to overcome self-focusing, filamentation, supercontinuum generation, aberrations, depth dependence and waveguide interface roughness using fs laser processing10.1038/s41598-017-00589-82045-2322https://doaj.org/article/587fd6595a1d424da5c23820d5ba1ee02017-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00589-8https://doaj.org/toc/2045-2322Abstract Several detrimental effects limit the use of ultrafast lasers in multi-photon processing and the direct manufacture of integrated photonics devices, not least, dispersion, aberrations, depth dependence, undesirable ablation at a surface, limited depth of writing, nonlinear optical effects such as supercontinuum generation and filamentation due to Kerr self-focusing. We show that all these effects can be significantly reduced if not eliminated using two coherent, ultrafast laser-beams through a single lens - which we call the Dual-Beam technique. Simulations and experimental measurements at the focus are used to understand how the Dual-Beam technique can mitigate these problems. The high peak laser intensity is only formed at the aberration-free tightly localised focal spot, simultaneously, suppressing unwanted nonlinear side effects for any intensity or processing depth. Therefore, we believe this simple and innovative technique makes the fs laser capable of much more at even higher intensities than previously possible, allowing applications in multi-photon processing, bio-medical imaging, laser surgery of cells, tissue and in ophthalmology, along with laser writing of waveguides.Jerome LapointeRaman KashyapNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jerome Lapointe Raman Kashyap A simple technique to overcome self-focusing, filamentation, supercontinuum generation, aberrations, depth dependence and waveguide interface roughness using fs laser processing
description	Abstract Several detrimental effects limit the use of ultrafast lasers in multi-photon processing and the direct manufacture of integrated photonics devices, not least, dispersion, aberrations, depth dependence, undesirable ablation at a surface, limited depth of writing, nonlinear optical effects such as supercontinuum generation and filamentation due to Kerr self-focusing. We show that all these effects can be significantly reduced if not eliminated using two coherent, ultrafast laser-beams through a single lens - which we call the Dual-Beam technique. Simulations and experimental measurements at the focus are used to understand how the Dual-Beam technique can mitigate these problems. The high peak laser intensity is only formed at the aberration-free tightly localised focal spot, simultaneously, suppressing unwanted nonlinear side effects for any intensity or processing depth. Therefore, we believe this simple and innovative technique makes the fs laser capable of much more at even higher intensities than previously possible, allowing applications in multi-photon processing, bio-medical imaging, laser surgery of cells, tissue and in ophthalmology, along with laser writing of waveguides.
format	article
author	Jerome Lapointe Raman Kashyap
author_facet	Jerome Lapointe Raman Kashyap
author_sort	Jerome Lapointe
title	A simple technique to overcome self-focusing, filamentation, supercontinuum generation, aberrations, depth dependence and waveguide interface roughness using fs laser processing
title_short	A simple technique to overcome self-focusing, filamentation, supercontinuum generation, aberrations, depth dependence and waveguide interface roughness using fs laser processing
title_full	A simple technique to overcome self-focusing, filamentation, supercontinuum generation, aberrations, depth dependence and waveguide interface roughness using fs laser processing
title_fullStr	A simple technique to overcome self-focusing, filamentation, supercontinuum generation, aberrations, depth dependence and waveguide interface roughness using fs laser processing
title_full_unstemmed	A simple technique to overcome self-focusing, filamentation, supercontinuum generation, aberrations, depth dependence and waveguide interface roughness using fs laser processing
title_sort	simple technique to overcome self-focusing, filamentation, supercontinuum generation, aberrations, depth dependence and waveguide interface roughness using fs laser processing
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/587fd6595a1d424da5c23820d5ba1ee0
work_keys_str_mv	AT jeromelapointe asimpletechniquetoovercomeselffocusingfilamentationsupercontinuumgenerationaberrationsdepthdependenceandwaveguideinterfaceroughnessusingfslaserprocessing AT ramankashyap asimpletechniquetoovercomeselffocusingfilamentationsupercontinuumgenerationaberrationsdepthdependenceandwaveguideinterfaceroughnessusingfslaserprocessing AT jeromelapointe simpletechniquetoovercomeselffocusingfilamentationsupercontinuumgenerationaberrationsdepthdependenceandwaveguideinterfaceroughnessusingfslaserprocessing AT ramankashyap simpletechniquetoovercomeselffocusingfilamentationsupercontinuumgenerationaberrationsdepthdependenceandwaveguideinterfaceroughnessusingfslaserprocessing
_version_	1718394157941129216

A simple technique to overcome self-focusing, filamentation, supercontinuum generation, aberrations, depth dependence and waveguide interface roughness using fs laser processing

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