Stimulated Brillouin Scattering Suppression in Fiber Amplifiers via Chirped Diode Lasers

Abstract

We propose to simultaneously suppress stimulated Brillouin scattering (SBS) and enable coherent combination by seeding fiber amplifiers with a linearly-chirped diode laser. The seed spectrum will appear broadband to suppress the SBS, but the well-defined chirp will have sufficient coherence to allow the active phasing of multiple amplifiers. The phasing can be accomplished without strict optical path-length matching by interfering each amplifier's output with a reference, processing the resulting signal with a phase-locked loop, and using the error signal to drive an acousto-optic frequency shifter at the frontend of each fiber amplifier.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2011
Accession Number
ADA552018

Entities

People

  • Carl E. Mungan
  • George Rakuljic
  • Jeffrey O. White

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Amplifiers
  • Bandwidth
  • Brillouin Scattering
  • Broadband
  • Diffraction
  • Frequency
  • Frequency Shift
  • Laser Beams
  • Laser Diodes
  • Lasers
  • Military Research
  • Optical Fiber Lasers
  • Phase
  • Scattering
  • Spectra

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Phased Array Antenna Design.
  • Radar Systems Engineering.

Technology Areas

  • Directed Energy