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TLM-based FDTD modelling of optical bistability

✍ Scribed by Tomislav Hruskovec; Zhizhang Chen

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
215 KB
Volume
14
Category
Article
ISSN
0894-3370

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✦ Synopsis

Abstract

The TLM‐based FDTD method is extended to the modelling of optical bistability caused by the saturable Kerr‐effect of a GaAs–GaAsAl multiple quantum well (MQW) like medium. This structure is one of the possible candidates to be used as an all‐optical switch in high‐speed communication systems. The purpose of this paper is to demonstrate the capability of the TLM‐based FDTD method in handling the non‐linear medium problems, by performing a time‐domain simulation starting from the basic equations that represent the problem. A recursive formulation is derived to account for the saturable Kerr properties of the material and a physically realizable Fabry–Perot cavity is simulated. The numerical results confirm the effectiveness of the TLM‐based FDTD method for bistability modelling, and thus provide the foundations for further work and the simulation of more complicated and realistic bistable structures promising for high‐speed all‐optical digital signal processing. Copyright © 2001 John Wiley & Sons, Ltd.

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