Spatio-spectral beam control in multimode diode-pumped Raman fibre lasers via intracavity filtering and Kerr cleaning

Abstract Multimode fibres provide a promising platform for boosting the capacity of fibre links and the output power of fibre lasers. The complex spatiotemporal dynamics of multimode beams may be controlled in spatial and temporal domains via the interplay of nonlinear, dispersive and dissipative ef...

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Autores principales:	Sergey A. Babin, Alexey G. Kuznetsov, Oleg S. Sidelnikov, Alexey A. Wolf, Ilya N. Nemov, Sergey I. Kablukov, Evgeniy V. Podivilov, Mikhail P. Fedoruk, Stefan Wabnitz
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9269784a939044b6a7d0f929571e794e
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spelling	oai:doaj.org-article:9269784a939044b6a7d0f929571e794e2021-11-14T12:18:41ZSpatio-spectral beam control in multimode diode-pumped Raman fibre lasers via intracavity filtering and Kerr cleaning10.1038/s41598-021-01491-02045-2322https://doaj.org/article/9269784a939044b6a7d0f929571e794e2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01491-0https://doaj.org/toc/2045-2322Abstract Multimode fibres provide a promising platform for boosting the capacity of fibre links and the output power of fibre lasers. The complex spatiotemporal dynamics of multimode beams may be controlled in spatial and temporal domains via the interplay of nonlinear, dispersive and dissipative effects. Raman nonlinearity induces beam cleanup in long graded-index fibres within a laser cavity, even for CW Stokes beams pumped by highly-multimode laser diodes (LDs). This leads to a breakthrough approach for wavelength-agile high-power lasers. However, current understanding of Raman beam cleanup is restricted to a small-signal gain regime, being not applicable to describing realistic laser operation. We solved this challenge by experimentally and theoretically studying pump-to-Stokes beam conversion in a graded-index fibre cavity. We show that random mode coupling, intracavity filtering and Kerr self-cleaning all play a decisive role for the spatio-spectral control of CW Stokes beams. Whereas the depleted LD pump radiation remains insensitive to them.Sergey A. BabinAlexey G. KuznetsovOleg S. SidelnikovAlexey A. WolfIlya N. NemovSergey I. KablukovEvgeniy V. PodivilovMikhail P. FedorukStefan WabnitzNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sergey A. Babin Alexey G. Kuznetsov Oleg S. Sidelnikov Alexey A. Wolf Ilya N. Nemov Sergey I. Kablukov Evgeniy V. Podivilov Mikhail P. Fedoruk Stefan Wabnitz Spatio-spectral beam control in multimode diode-pumped Raman fibre lasers via intracavity filtering and Kerr cleaning
description	Abstract Multimode fibres provide a promising platform for boosting the capacity of fibre links and the output power of fibre lasers. The complex spatiotemporal dynamics of multimode beams may be controlled in spatial and temporal domains via the interplay of nonlinear, dispersive and dissipative effects. Raman nonlinearity induces beam cleanup in long graded-index fibres within a laser cavity, even for CW Stokes beams pumped by highly-multimode laser diodes (LDs). This leads to a breakthrough approach for wavelength-agile high-power lasers. However, current understanding of Raman beam cleanup is restricted to a small-signal gain regime, being not applicable to describing realistic laser operation. We solved this challenge by experimentally and theoretically studying pump-to-Stokes beam conversion in a graded-index fibre cavity. We show that random mode coupling, intracavity filtering and Kerr self-cleaning all play a decisive role for the spatio-spectral control of CW Stokes beams. Whereas the depleted LD pump radiation remains insensitive to them.
format	article
author	Sergey A. Babin Alexey G. Kuznetsov Oleg S. Sidelnikov Alexey A. Wolf Ilya N. Nemov Sergey I. Kablukov Evgeniy V. Podivilov Mikhail P. Fedoruk Stefan Wabnitz
author_facet	Sergey A. Babin Alexey G. Kuznetsov Oleg S. Sidelnikov Alexey A. Wolf Ilya N. Nemov Sergey I. Kablukov Evgeniy V. Podivilov Mikhail P. Fedoruk Stefan Wabnitz
author_sort	Sergey A. Babin
title	Spatio-spectral beam control in multimode diode-pumped Raman fibre lasers via intracavity filtering and Kerr cleaning
title_short	Spatio-spectral beam control in multimode diode-pumped Raman fibre lasers via intracavity filtering and Kerr cleaning
title_full	Spatio-spectral beam control in multimode diode-pumped Raman fibre lasers via intracavity filtering and Kerr cleaning
title_fullStr	Spatio-spectral beam control in multimode diode-pumped Raman fibre lasers via intracavity filtering and Kerr cleaning
title_full_unstemmed	Spatio-spectral beam control in multimode diode-pumped Raman fibre lasers via intracavity filtering and Kerr cleaning
title_sort	spatio-spectral beam control in multimode diode-pumped raman fibre lasers via intracavity filtering and kerr cleaning
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9269784a939044b6a7d0f929571e794e
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Spatio-spectral beam control in multimode diode-pumped Raman fibre lasers via intracavity filtering and Kerr cleaning

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