Design and evaluation of optical switching architectures

Sundaram K. Ramesh; Thomas D. Smith

doi:10.1117/12.44926

Abstract

We report on the design and simulation of optical switches for use in communication networks. These switches are promising due to their large bandwidth potential and high switching speeds. These advantages are limited however, by high power dissipation, and device and material constraints. Architectural advances in the design of optical switches are expected to lead to improved performance and higher reliability. A 2 X 2 rectangular switch based on directional couplers is designed and simulated using PUFF. Factors employed to optimize this design include the refractive index of the substrate, LiNbO₃, and the dimensions of the titanium waveguide. Simulation of the design prior to construction of the switch permits optimization of the PUFF results. These include the scattering parameters and their frequency response. Architectural considerations for optical switches are then evaluated using the 2 X 2 switch as a building block. Several blocking and nonblocking architectures such as crossbar matrix, double crossbar, and planar switch are designed. The system crosstalk, insertion loss, and signal to noise ratio for the architectures are calculated as a function of switch dimensions.

Citation Download Citation

Sundaram K. Ramesh, Sundaram K. Ramesh, Thomas D. Smith, Thomas D. Smith, } "Design and evaluation of optical switching architectures", Proc. SPIE 1474, Optical Technology for Signal Processing Systems, (1 September 1991); doi: 10.1117/12.44926; https://doi.org/10.1117/12.44926

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