High resolution stimulated brillouin spectroscopy in glasses and crystals

Technical Report · Fri Apr 24 04:00:00 EDT 1992

OSTI ID:6770141

Faris, G W; Jusinski, L E; Hickman, A P ^[1]

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1. SRI International, Menlo Park, CA (United States). Molecular Physics Lab.

Theory and measurements are presented for stimulated Brillouin gain spectroscopy in anisotropic media. The coupling between arbitrary pump and Stokes waves and the corresponding acoustic wave is formulated in terms of the elastic displacement vector and the photoelastic tensor. A propagation equation that fully includes transient effects is obtained for the Stokes wave. In the limit of small signal gains, this propagation equation can be solved analytically, yielding expressions that relate experimentally accessible quantities to material properties. Absolute Brillouin steady-state gain coefficients, linewidths, and frequency shifts are thereby determined in a number of optical materials at 532 nm. The Brillouin gain coefficient for fused silica is measured by three techniques, providing the reference for absolute gain measurements. Quantitative agreement is found between theory and experiment for transient effects on stimulated Brillouin scattering.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6770141
• Report Number(s): UCRL-CR-103295-92; ON: DE93013135
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606 -- Other Materials-- Physical Properties-- (1992-)
664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANISOTROPY
BRILLOUIN EFFECT
COHERENT SCATTERING
CRYSTALS
DATA
EVALUATION
EXPERIMENTAL DATA
GLASS
HYDROMAGNETIC WAVES
INFORMATION
LAWRENCE LIVERMORE LABORATORY
MAGNETOACOUSTIC WAVES
NATIONAL ORGANIZATIONS
NUMERICAL DATA
OPTICAL PROPERTIES
OPTICS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFRACTIVE INDEX
SCATTERING
SILICATES
SILICON COMPOUNDS
SPECTROSCOPY
STOKES PARAMETERS
TENSORS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WAVE PROPAGATION