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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 30, Iss. 2 — Feb. 1, 2013
  • pp: 244–250

Pockels’ coefficients of alumina in aluminosilicate optical fiber

Peter D. Dragic, John Ballato, Stephanie Morris, and Thomas Hawkins  »View Author Affiliations


JOSA B, Vol. 30, Issue 2, pp. 244-250 (2013)
http://dx.doi.org/10.1364/JOSAB.30.000244


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Abstract

The photoelastic constants of the alumina component in aluminosilicate optical fibers are evaluated and determined to be p11=0.237±0.020 and p12=0.027±0.012, thus confirming that the low and negative pij characteristics of bulk alumina are conserved as part of a binary aluminosilicate glass system in optical fiber form. In order to enumerate these values, the strain- and stress-optic coefficients of two fibers (one with an aluminosilicate core and one with a pure silica core) were measured by applying mechanical tension or twist, respectively, to the fibers and measuring changes to an optical system as a function of the mechanical deformation. In the former, the strain-optic coefficient (εOC) is measured directly by recording changes to the free spectral range of a ring fiber laser. In the latter, the stress-optic coefficient (σOC) is found by measuring the change in polarization angle after linearly polarized light propagates through a segment of twisted test fiber. To the best of our knowledge, this is the first such measurement of its type, i.e., the retrieval of the component photoelastic constants, with their signs, of a multicomponent glass. Binary glass compositions wherein the constituents have opposite signs of the photoelastic constant (such as the aluminosilicates) have the potential to give rise to extremely low values of the Brillouin gain coefficient.

© 2013 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2290) Fiber optics and optical communications : Fiber materials
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2400) Fiber optics and optical communications : Fiber properties
(160.2750) Materials : Glass and other amorphous materials
(290.5830) Scattering : Scattering, Brillouin

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: September 4, 2012
Revised Manuscript: October 30, 2012
Manuscript Accepted: November 16, 2012
Published: January 3, 2013

Citation
Peter D. Dragic, John Ballato, Stephanie Morris, and Thomas Hawkins, "Pockels’ coefficients of alumina in aluminosilicate optical fiber," J. Opt. Soc. Am. B 30, 244-250 (2013)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-2-244

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