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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 25 — Dec. 3, 2012
  • pp: 27810–27819

Precise tailoring of acoustic velocity in optical fibers by hydrogenation and UV exposure

Fanting Kong and Liang Dong  »View Author Affiliations

Optics Express, Vol. 20, Issue 25, pp. 27810-27819 (2012)

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Tailoring of acoustic properties in solids has many potential applications in both acoustics, i.e. acoustic gratings and waveguides, and photon-phonon interactions, i.e. stimulated Brillouin scattering (SBS). One immediate application is in the area of SBS suppression in optical fibers. We demonstrate, for the first time, a post-processing technique where hydrogen is diffused in to a fiber core and then locally and permanently bonded to core glass by a subsequent UV exposure. It is discovered that local acoustic velocity can be altered by as much as ~2% this way, with strong potential for much further improvements with an increased hydrogen pressure. It is also found that the large change in acoustic velocity is primarily due to a reduction in bulk modulus, possibly as a result of network bonds being broken up by the addition of OH bonds. It is possible to use this technique to precisely tailor acoustic velocity along a fiber for more optimized SBS suppression in a fiber amplifier. Change in Brillouin Stokes frequency of ~320MHz at 1.064μm was observed.

© 2012 OSA

OCIS Codes
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(190.5890) Nonlinear optics : Scattering, stimulated
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: September 24, 2012
Revised Manuscript: November 12, 2012
Manuscript Accepted: November 14, 2012
Published: November 29, 2012

Fanting Kong and Liang Dong, "Precise tailoring of acoustic velocity in optical fibers by hydrogenation and UV exposure," Opt. Express 20, 27810-27819 (2012)

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