Raman transformation properties of partially coherent laser pulses in phosphorus-doped silica fibre

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Abstract

The work reports for the first time on fibre-based Raman conversion with relatively large Stokes shift pumped by double-scale laser pulses having various degree of coherence. It was discovered that the degree of coherence of the pump pulses affects significantly the amount of the wavelength shift, intensity, and spectral width of frequency-downconverted radiation. At lower coherence within double-scale pulses, the magnitude of intra-pulse femtosecond field oscillation grows, leading to stronger nonlinear pulse interaction with the optical medium. This discovery suggests new approaches to nonlinear transformation of partially coherent laser pulses, typical of many mode-locked generation regimes of fibre lasers.

Original languageEnglish
Title of host publicationNonlinear Frequency Generation and Conversion
Subtitle of host publicationMaterials and Devices XVIII
EditorsPeter G. Schunemann, Kenneth L. Schepler
PublisherSPIE
Number of pages6
ISBN (Electronic)9781510624467
DOIs
Publication statusPublished - 1 Jan 2019
EventNonlinear Frequency Generation and Conversion: Materials and Devices XVIII 2019 - San Francisco, United States
Duration: 5 Feb 20197 Feb 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10902
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceNonlinear Frequency Generation and Conversion: Materials and Devices XVIII 2019
CountryUnited States
CitySan Francisco
Period05.02.201907.02.2019

Keywords

  • mode-locked fiber laser
  • nonlinear optics
  • stimulated Raman scattering
  • ultrashort laser pulses
  • GENERATION
  • LONG

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