Frequency doubling of graded-index fiber Raman lasers with multimode diode pumping

Aleksey G. Kuznetsov, Ekaterina A. Evmenova, Ekaterina I. Dontsova, Sergey I. Kablukov, Sergey A. Babin

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

Abstract

Graded-index fibers with special in-fiber Bragg gratings are shown to convert efficiently highly multimode (M2 ∼30) laser diode pump radiation in all-fiber Raman laser configuration into a high-quality Stokes beam at 954 and 976 nm (M2 =1.6-2.6 in different configurations). The beam quality improvement is provided by well-known Raman beam cleanup effect defined by Raman gain profile, and additional impact of transverse mode-selective properties of cavity feedback provided by special femtosecond-pulse inscribed fiber Bragg gratings and/or random Rayleigh backscattering distributed along the fiber. Here we study frequency doubling of the diode-pumped Raman fiber laser in a simple singlepass scheme with 5-mm PPLN crystal demonstrating efficient second harmonics generation at 477 and 488 nm with high beam quality after elimination of interfering effects.

Original languageEnglish
Title of host publicationNonlinear Frequency Generation and Conversion
Subtitle of host publicationMaterials and Devices XIX
EditorsPeter G. Schunemann, Kenneth L. Schepler
PublisherSPIE
Number of pages7
ISBN (Electronic)9781510632912
DOIs
Publication statusPublished - 2 Mar 2020
EventNonlinear Frequency Generation and Conversion: Materials and Devices XIX 2020 - San Francisco, United States
Duration: 3 Feb 20205 Feb 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11264
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceNonlinear Frequency Generation and Conversion: Materials and Devices XIX 2020
CountryUnited States
CitySan Francisco
Period03.02.202005.02.2020

Keywords

  • Beam clean-up
  • Diode pumping
  • Fiber laser
  • Frequency doubling
  • Graded-index fiber
  • Raman laser
  • beam clean-up
  • graded-index fiber
  • diode pumping
  • fiber laser
  • frequency doubling

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