The acoustic characterization of six glasses each doped with one of the following dopants: GeO$ sb2$, P$ sb2$O$ sb5$, F, TiO$ sb2$, B$ sb2$O$ sb3$ or Al$ sb2$O$ sb3$ is presented. We have found that a linear variation of acoustic velocities versus dopant concentration for each dopant studied and the addition of Al$ sb2$O$ sb3$ increases the acoustic velocity while all the other dopants decrease this velocity. In addition, the acoustic velocity variation is more sensitive than the optical refractive index to the dopant concentration for the doped silica glasses investigated. Furthermore, the F and GeO$ sb2$ doped silica glasses exhibit higher acoustic loss than pure fused silica does. / These six doped glasses are widely used as core and cladding material for optical fibers. Their acoustic properties can affect the backward stimulated Brillouin scattering since this scattering involves acoustic disturbances of the material. The SBBS threshold is evaluated theoretically taking the Bragg and the nonlinear coupling of the pump and Stokes into account. / Effects of different acoustic profiles of SMOFs on SBBS are experimentally investigated. (Abstract shortened by UMI.)
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.61056 |
| Date | January 1992 |
| Creators | Shang, Alain |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Engineering (Department of Electrical Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001291254, proquestno: AAIMM74640, Theses scanned by UMI/ProQuest. |
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