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3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation
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dc.contributor.author | Sokolovskii, Grigorii S. | |
dc.contributor.author | Melissinaki, Vasileia | |
dc.contributor.author | Fedorova, Ksenia A. | |
dc.contributor.author | Dudelev, Vladislavv | |
dc.contributor.author | Losev, Sergey N. | |
dc.contributor.author | Bougrov, Vladislav E. | |
dc.contributor.author | Sibbett, Wilson | |
dc.contributor.author | Farsari, Maria | |
dc.contributor.author | Rafailov, Edik U. | |
dc.date.accessioned | 2018-10-16T12:30:07Z | |
dc.date.available | 2018-10-16T12:30:07Z | |
dc.date.issued | 2018-10-02 | |
dc.identifier | 256214141 | |
dc.identifier | 518f3ab2-2598-4376-b0bf-b916429189b4 | |
dc.identifier | 000446034000019 | |
dc.identifier | 85054170429 | |
dc.identifier | 000446034000019 | |
dc.identifier.citation | Sokolovskii , G S , Melissinaki , V , Fedorova , K A , Dudelev , V , Losev , S N , Bougrov , V E , Sibbett , W , Farsari , M & Rafailov , E U 2018 , ' 3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation ' , Scientific Reports , vol. 8 , 14618 . https://doi.org/10.1038/s41598-018-32970-6 | en |
dc.identifier.issn | 2045-2322 | |
dc.identifier.uri | https://hdl.handle.net/10023/16233 | |
dc.description | EUR was partially supported by Grant of Russian Ministry of Science and Education (Grant No. 18-15-00172). | en |
dc.description.abstract | 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. | |
dc.format.extent | 9 | |
dc.format.extent | 1630100 | |
dc.language.iso | eng | |
dc.relation.ispartof | Scientific Reports | en |
dc.subject | QC Physics | en |
dc.subject | NDAS | en |
dc.subject.lcc | QC | en |
dc.title | 3D laser nano-printing on fibre paves the way for super-focusing of multimode laser radiation | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | 10.1038/s41598-018-32970-6 | |
dc.description.status | Peer reviewed | en |
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