Cargando…

3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation

Multimode high-power laser diodes suffer from inefficient beam focusing, leading to a focal spot 10–100 times greater than the diffraction limit. This inevitably restricts their wider use in ‘direct-diode’ applications in materials processing and biomedical photonics. We report here a ‘super-focusin...

Descripción completa

Detalles Bibliográficos
Autores principales: Sokolovskii, Grigorii S., Melissinaki, Vasileia, Fedorova, Ksenia A., Dudelev, Vladislav V., Losev, Sergey N., Bougrov, Vladislav E., Sibbett, Wilson, Farsari, Maria, Rafailov, Edik U.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6168556/
https://www.ncbi.nlm.nih.gov/pubmed/30279432
http://dx.doi.org/10.1038/s41598-018-32970-6
_version_ 1783360373755215872
author Sokolovskii, Grigorii S.
Melissinaki, Vasileia
Fedorova, Ksenia A.
Dudelev, Vladislav V.
Losev, Sergey N.
Bougrov, Vladislav E.
Sibbett, Wilson
Farsari, Maria
Rafailov, Edik U.
author_facet Sokolovskii, Grigorii S.
Melissinaki, Vasileia
Fedorova, Ksenia A.
Dudelev, Vladislav V.
Losev, Sergey N.
Bougrov, Vladislav E.
Sibbett, Wilson
Farsari, Maria
Rafailov, Edik U.
author_sort Sokolovskii, Grigorii S.
collection PubMed
description Multimode high-power laser diodes suffer from inefficient beam focusing, leading to a focal spot 10–100 times greater than the diffraction limit. This inevitably restricts their wider use in ‘direct-diode’ applications in materials processing and biomedical photonics. We report here a ‘super-focusing’ characteristic for laser diodes, where the exploitation of self-interference of modes enables a significant reduction of the focal spot size. This is achieved by employing a conical microlens fabricated on the tip of a multimode optical fibre using 3D laser nano-printing (also known as multi-photon lithography). When refracted by the conical surface, the modes of the fibre-coupled laser beam self-interfere and form an elongated narrow focus, usually referred to as a ‘needle’ beam. The multiphoton lithography technique allows the realisation of almost any optical element on a fibre tip, thus providing the most suitable interface for free-space applications of multimode fibre-delivered laser beams. In addition, we demonstrate the optical trapping of microscopic objects with a super-focused multimode laser diode beam thus rising new opportunities within the applications sector where lab-on-chip configurations can be exploited. Most importantly, the demonstrated super-focusing approach opens up new avenues for the ‘direct-diode’ applications in material processing and 3D printing, where both high power and tight focusing is required.
format Online
Article
Text
id pubmed-6168556
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-61685562018-10-05 3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation Sokolovskii, Grigorii S. Melissinaki, Vasileia Fedorova, Ksenia A. Dudelev, Vladislav V. Losev, Sergey N. Bougrov, Vladislav E. Sibbett, Wilson Farsari, Maria Rafailov, Edik U. Sci Rep Article Multimode high-power laser diodes suffer from inefficient beam focusing, leading to a focal spot 10–100 times greater than the diffraction limit. This inevitably restricts their wider use in ‘direct-diode’ applications in materials processing and biomedical photonics. We report here a ‘super-focusing’ characteristic for laser diodes, where the exploitation of self-interference of modes enables a significant reduction of the focal spot size. This is achieved by employing a conical microlens fabricated on the tip of a multimode optical fibre using 3D laser nano-printing (also known as multi-photon lithography). When refracted by the conical surface, the modes of the fibre-coupled laser beam self-interfere and form an elongated narrow focus, usually referred to as a ‘needle’ beam. The multiphoton lithography technique allows the realisation of almost any optical element on a fibre tip, thus providing the most suitable interface for free-space applications of multimode fibre-delivered laser beams. In addition, we demonstrate the optical trapping of microscopic objects with a super-focused multimode laser diode beam thus rising new opportunities within the applications sector where lab-on-chip configurations can be exploited. Most importantly, the demonstrated super-focusing approach opens up new avenues for the ‘direct-diode’ applications in material processing and 3D printing, where both high power and tight focusing is required. Nature Publishing Group UK 2018-10-02 /pmc/articles/PMC6168556/ /pubmed/30279432 http://dx.doi.org/10.1038/s41598-018-32970-6 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Sokolovskii, Grigorii S.
Melissinaki, Vasileia
Fedorova, Ksenia A.
Dudelev, Vladislav V.
Losev, Sergey N.
Bougrov, Vladislav E.
Sibbett, Wilson
Farsari, Maria
Rafailov, Edik U.
3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation
title 3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation
title_full 3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation
title_fullStr 3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation
title_full_unstemmed 3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation
title_short 3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation
title_sort 3d laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6168556/
https://www.ncbi.nlm.nih.gov/pubmed/30279432
http://dx.doi.org/10.1038/s41598-018-32970-6
work_keys_str_mv AT sokolovskiigrigoriis 3dlasernanoprintingonfibrepavesthewayforsuperfocusingofmultimodelaserradiation
AT melissinakivasileia 3dlasernanoprintingonfibrepavesthewayforsuperfocusingofmultimodelaserradiation
AT fedorovakseniaa 3dlasernanoprintingonfibrepavesthewayforsuperfocusingofmultimodelaserradiation
AT dudelevvladislavv 3dlasernanoprintingonfibrepavesthewayforsuperfocusingofmultimodelaserradiation
AT losevsergeyn 3dlasernanoprintingonfibrepavesthewayforsuperfocusingofmultimodelaserradiation
AT bougrovvladislave 3dlasernanoprintingonfibrepavesthewayforsuperfocusingofmultimodelaserradiation
AT sibbettwilson 3dlasernanoprintingonfibrepavesthewayforsuperfocusingofmultimodelaserradiation
AT farsarimaria 3dlasernanoprintingonfibrepavesthewayforsuperfocusingofmultimodelaserradiation
AT rafailovediku 3dlasernanoprintingonfibrepavesthewayforsuperfocusingofmultimodelaserradiation