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Proceedings Paper

Collective effects, nonlinear response, and critical switching intensity in densely doped composite materials
Author(s): Yan Ling Xue; Geoffrey B. Smith; Anthony T. Baker
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Paper Abstract

We have performed a study of the population dynamics in a composite, in which the active-medium is densely doped, by considering the near dipole-dipole interaction between nearest neighboring active particles. A model is presented to describe the particle-particle collective effects on the response time of the nonlinear refractive index in such a densely doped composite to an input optical signal. The results show that collective effects greatly enhance the magnitude of the nonlinear refractive index without changing the transient response time. This is expected to have potential in lowering the critical switching intensity of bistable switching devices without sacrificing switching speed. We examined two typical composites: rare-earth densely doped silica and perylimide-dye densely doped polymer/glass composites. It is found that perylimide-dye densely doped polymer/glass composite is more suitable for the switching application due to its large nonlinear refractive index and fast response time at relatively low optical intensity.

Paper Details

Date Published: 20 September 1996
PDF: 12 pages
Proc. SPIE 2893, Fiber Optic Components and Optical Communication, (20 September 1996); doi: 10.1117/12.252002
Show Author Affiliations
Yan Ling Xue, Univ. of Technology (Australia)
Geoffrey B. Smith, Univ. of Technology (Australia)
Anthony T. Baker, Univ. of Technology (Australia)

Published in SPIE Proceedings Vol. 2893:
Fiber Optic Components and Optical Communication
Kam Tai Chan; Shuisheng Jian; Franklin F. Tong, Editor(s)

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