Transverse mode selection in diode-pumped multimode fiber Raman lasers

Ekaterina A. Zlobina, Sergey I. Kablukov, Alexey A. Wolf, Ilya N. Nemov, Alexandr V. Dostovalov, Sergey A. Babin

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

We report on the transverse mode selection in an all-fiber CW Raman laser based on a multimode graded-index fiber directly pumped by multimode laser diodes. Selection properties of special fiber Bragg gratings inscribed by UV CW or IR femtosecond radiation in the 100-μm core of graded-index fiber are experimentally compared. It is also theoretically explained why the better fundamental mode selection occurs in the femtosecond fiber Bragg grating inscribed in the fiber with lower core diameter. Fibers with core diameter of 62.5, 85 and 100 um are compared in the experiment. With core enlargement, the output power and slope efficiency increase sufficiently (from 47% to 84%) at the expense of slight beam-quality parameter increase (M2 =1.3-3).

Original languageEnglish
Title of host publicationFiber Lasers and Glass Photonics
Subtitle of host publicationMaterials through Applications
EditorsS Taccheo, JI Mackenzie, M Ferrari
PublisherSPIE
Number of pages7
Volume10683
ISBN (Electronic)9781510618923
DOIs
Publication statusPublished - 1 Jan 2018
EventFiber Lasers and Glass Photonics: Materials through Applications 2018 - Strasbourg, France
Duration: 22 Apr 201826 Apr 2018

Publication series

NameProceedings of SPIE
PublisherSPIE-INT SOC OPTICAL ENGINEERING
Volume10683
ISSN (Print)0277-786X

Conference

ConferenceFiber Lasers and Glass Photonics: Materials through Applications 2018
CountryFrance
CityStrasbourg
Period22.04.201826.04.2018

Keywords

  • Beam clean-up
  • Diode pumping
  • Fiber Bragg grating
  • Graded-index fiber
  • Raman fiber laser
  • Transverse mode selection.
  • beam clean-up
  • graded-index fiber
  • transverse mode selection
  • fiber Bragg grating
  • diode pumping

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