Acoustic coefficients of P2O5-doped silica fiber: The strain-optic and strain-acoustic coefficients

Pi Cheng Law, André Croteau, Peter D. Dragic

Research output: Contribution to journalArticlepeer-review


We present measurements and modeling of the effect of P2O5 doping on the strain sensitivity coefficients of silica fibers. In particular, the Brillouin gain spectrum of a heavily P2O5-doped fiber is measured and investigated at different strains. We provide measurements of the strainoptic coefficient (SOC) and the strain-acoustic coefficient (SAC), obtained to be + 0.139 and + 9854m/sec/ε, respectively, both of which are less than the pure silica values. The Pockels' coefficients p11 and p12 for bulk P2O5 are also estimated via Brillouin gain measurements. Using the strain coefficients, the modeled and unique slopes of the Stokes'-shift-versusstrain curves for the four observed acoustic modes in the fiber each lie within 2% of the measured values.

Original languageEnglish (US)
Pages (from-to)391-404
Number of pages14
JournalOptical Materials Express
Issue number4
StatePublished - Apr 1 2012

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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