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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 23, Iss. 8 — Aug. 1, 2005
  • pp: 2462–

Efficient Nonadiabatic Planar Waveguide Tapers

Bert Luyssaert, Peter Bienstman, Peter Vandersteegen, Pieter Dumon, and Roel Baets

Journal of Lightwave Technology, Vol. 23, Issue 8, pp. 2462- (2005)


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Abstract

We report taper designs with high transmission efficiencies and with lengths shorter than those needed for adiabatic operation. The tapering occurs between rectangular optical waveguides with the same vertical silicon-on-insulator layer structure, but with different horizontal widths, namely 0.5 and 2.0 µm, and for taper lengths between 0.5 and 3.0 µm. After a comparison between two different optimization methods in a two-dimensional calculation scheme, one of these is repeated using three-dimensional calculations. The results show that, also in the length region where conventional linear and parabolic tapers are not yet adiabatic, tapers with a high efficiency can be designed by applying complex taper structures with more degrees of freedom.

© 2005 IEEE

Citation
Bert Luyssaert, Peter Bienstman, Peter Vandersteegen, Pieter Dumon, and Roel Baets, "Efficient Nonadiabatic Planar Waveguide Tapers," J. Lightwave Technol. 23, 2462- (2005)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-23-8-2462


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