Laser Intensity Scaling Through Stimulated Scattering in Optical Fibers

Abstract

The influence of stimulated scattering on laser intensity in fiber optic waveguides is examined. Stimulated Brillouin scattering (SBS) in long, multimode optical waveguides is found to generate a Stokes beam that propagates in the fiber LP01 mode. Additionally, the same process is found to combine multiple laser beams into a single spatially coherent source. Limitations in beam cleanup and combining are also investigated to identify ways to overcome them. The last portion of the dissertation theoretically examines suppression of stimulated Raman scattering in fibers to eliminate the restriction this imposes on the power of a fiber laser or amplifier. The suppression was modeled using both a holmium dopant and adding a long period grating to the fiber. Both methods were shown to have a significant effect on the SRS threshold.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 17, 2001
Accession Number
ADA398033

Entities

People

  • Timothy H. Russell

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Diffraction
  • Distributed Feedback Lasers
  • Electromagnetic Scattering
  • Frequency Combs
  • Laser Applications
  • Laser Beams
  • Lasers
  • Light (Electromagnetic Radiation)
  • Nonlinear Optics
  • Optical Fiber Lasers
  • Optical Fibers
  • Optical Properties
  • Optics
  • Refraction
  • Scattering
  • Wave Mixing
  • Waveplates

Fields of Study

  • Physics

Readers

  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Pulsed Power and Plasma Physics.
  • Systems Analysis and Design

Technology Areas

  • Directed Energy