Volume Bragg Grating for Coupling the Stokes Wave Out of an Amplifier

Abstract

High power multimode fiber (MMF) master-oscillator power amplifiers (MOPAs) with stimulated Brillouin scattering (SBS) beam cleanup and wavefront reversal are under development at the U.S. Army Research Laboratory (ARL) to counter rockets, artillery, and mortar (CRAM). When Faraday isolators are used for outcoupling the Stokes light in the MMF MOPAs, the power scalability is limited. Volume Bragg gratings (VBGs) appear to be more scalable. We report here the results of tests on a VBG designed to separate wavelengths 0.0604 nm (16 GHz) apart, corresponding to the SBS frequency shift at 1064 nm in fused silica.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2010
Accession Number
ADA531597

Entities

People

  • Jeffrey O. White
  • John E. Mcelhenny
  • Steven D. Rogers
  • Tigran Sanamyan

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplifiers
  • Bragg Gratings
  • Brillouin Scattering
  • Couplings
  • Frequency
  • Frequency Shift
  • Geometry
  • Gratings (Spectra)
  • Military Research
  • Optical Isolators
  • Optical Materials
  • Oscillators
  • Power Amplifiers
  • Scattering
  • Steady State
  • Three Dimensional
  • Wavefronts

Fields of Study

  • Physics

Readers

  • Optical Physics and Photonics.
  • ballistics.