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...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2021-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-021-01491-0 |
| _version_ | 1819003323696545792 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-20T23:19:11Z |
| format | Article |
| id | doaj.art-9269784a939044b6a7d0f929571e794e |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-20T23:19:11Z |
| publishDate | 2021-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-9269784a939044b6a7d0f929571e794e2022-12-21T19:23:34ZengNature PortfolioScientific Reports2045-23222021-11-011111710.1038/s41598-021-01491-0Spatio-spectral beam control in multimode diode-pumped Raman fibre lasers via intracavity filtering and Kerr cleaningSergey A. Babin0Alexey G. Kuznetsov1Oleg S. Sidelnikov2Alexey A. Wolf3Ilya N. Nemov4Sergey I. Kablukov5Evgeniy V. Podivilov6Mikhail P. Fedoruk7Stefan Wabnitz8Institute of Automation and Electrometry SB RASInstitute of Automation and Electrometry SB RASNovosibirsk State UniversityInstitute of Automation and Electrometry SB RASInstitute of Automation and Electrometry SB RASInstitute of Automation and Electrometry SB RASInstitute of Automation and Electrometry SB RASNovosibirsk State UniversityNovosibirsk State UniversityAbstract 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.https://doi.org/10.1038/s41598-021-01491-0 |
| spellingShingle | 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 Scientific Reports |
| title | 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_short | 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 |
| url | https://doi.org/10.1038/s41598-021-01491-0 |
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