Diode-pumped all-fiber Raman lasers with high beam quality

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

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

Abstract

We report on the first all-fiber CW Raman laser based on a multimode graded-index fiber directly pumped by multimode laser diodes. A joint action of Raman clean-up effect and mode-selection properties of special fiber Bragg gratings inscribed in the central part of fiber core, results in high-efficiency conversion of a multimode (M2∼26) pump at 915 nm into a high-quality output beam at 954 nm. Fibers with core diameter of 62.5, 85 and 100 um are compared. With core enlargement, the output power and slope efficiency increase sufficiently (from 47% to 84%) at the expense of slight beam-quality parameter reduction (M2=1.3-3).

Original languageEnglish
Title of host publicationFIBER LASERS XV: TECHNOLOGY AND SYSTEMS
Subtitle of host publicationTechnology and Systems
Editors Hartl, AL Carter
PublisherSPIE
Number of pages6
Volume10512
ISBN (Electronic)9781510615090
ISBN (Print)978-1-5106-1509-0
DOIs
Publication statusPublished - 1 Jan 2018
EventFiber Lasers XV: Technology and Systems 2018 - San Francisco, United States
Duration: 29 Jan 20181 Feb 2018

Publication series

NameProceedings of SPIE
PublisherSPIE-INT SOC OPTICAL ENGINEERING
Volume10512
ISSN (Print)0277-786X

Conference

ConferenceFiber Lasers XV: Technology and Systems 2018
CountryUnited States
CitySan Francisco
Period29.01.201801.02.2018

Keywords

  • beam clean-up
  • diode pumping
  • fiber Bragg grating
  • fiber laser
  • graded-index fiber
  • Raman laser
  • CW

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