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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 23,
  • Issue 3,
  • pp. 1284-
  • (2005)

Optimal Design of Planar Wavelength Circuits Based on Mach-Zehnder Interferometers and Their Cascaded Forms

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Abstract

Optimal design of planar wavelength circuits based on Mach-Zehnder interferometers and their cascaded forms is presented with the wavelength dependence of the directional couplers considered. A simple approximate formula is presented to calculate quickly the wavelength-dependent phase difference for a directional coupler. By using this simple and effective formula and the genetic algorithm, a broadband coupler (1450-1650 nm) based on a Mach-Zehnder interferometer and a flat-top passband coarse wavelength division demultiplexer (with a channel spacing of 20 nm) based on cascaded Mach-Zehnder interferometers are optimally designed.

© 2005 IEEE

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