New schemes and regimes of CW and pulsed Raman fiber lasers

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Abstract

A review of recent results on new schemes and regimes of Raman fiber lasers (RFL) is presented. The key feature of RFLs is generation in new wavelength ranges, which are not covered by existing fiber lasers based on rare-earth doped active fibers. New high-brightness 9.. nm all-fiber source based on directly diode pumped passive GRIN multimode fiber with in-core fiber Bragg gratings (FBGs) enables high-efficiency Raman generation of high-quality (M2≤2.6) beam at powers up to ∼100 W with further scaling capabilities. Mirrorless scheme based on Rayleigh-backscattering random distributed feedback (RDFB) in a singlemode polarization-maintaining (PM) fiber provides ultimate pump-to-Stokes conversion efficiency for the first order as well as cascaded generation of higher orders in 1-2 μm range. Single-frequency Raman lasing in a short (∼10 m) PM fiber with RDFB based on random FBG array has been also demonstrated. Pulsed operation of RFL at active Q-switching and mode-locking in passive fibers is realized with pulse energies and durations of up to 30 μJ and ∼50 ps, correspondingly. New regime of Raman dissipative solitons (of the first and second Stokes orders) synchronously generated in a common or external resonant cavity and their nonlinear mixing in PCF provide generation of <300 femtosecond pulses with ∼10 nJ energy at new wavelengths in 900-1300 nm range.

Original languageEnglish
Title of host publicationLaser Technology for Defense and Security XIV
EditorsM Dubinskiy, TC Newell
PublisherSPIE
Number of pages11
Volume10637
ISBN (Electronic)9781510617858
DOIs
Publication statusPublished - 1 Jan 2018
EventLaser Technology for Defense and Security XIV 2018 - Orlando, United States
Duration: 17 Apr 201818 Apr 2018

Publication series

NameProceedings of SPIE
PublisherSPIE-INT SOC OPTICAL ENGINEERING
Volume10637
ISSN (Print)0277-786X

Conference

ConferenceLaser Technology for Defense and Security XIV 2018
CountryUnited States
CityOrlando
Period17.04.201818.04.2018

Keywords

  • beam clean-up
  • cascaded Raman laser
  • diode pumping
  • fiber Bragg grating
  • fiber laser
  • frequency mixing
  • graded-index fiber
  • Raman dissipative soliton
  • Raman laser
  • random FBG
  • random lasing
  • POWER
  • GENERATION
  • HIGH-EFFICIENCY

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