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Optical Engineering

Demultiplexers for ultranarrow channel spacing based on Mach-Zehnders and ring resonators
Author(s): Carmen Vazquez Garcia; Salvador E. Vargas; Jose M. Sanchez-Pena; Ana Belen Gonzalo
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Paper Abstract

Novel demultiplexer configurations based on concatenated Mach-Zehnders and a ring resonator are presented. These new devices exhibit high channel isolation, flexibility, no loss, and megahertz-adjustable full width at half maximum (FWHM) suitable for narrow channel spacing. General design equations are described. Examples of a 1×4-2.5-GHz demultiplexer and a 2.5-GHz/5-GHz interleaver are reported. These designs have channel isolation >40 dB, 128 MHz FWHM, 10 dB gain. These devices can be conveniently implemented using the silicon or InP integrated optic technologies. A fabrication tolerance analysis is carried out. The worst figures for the previous designs are 220 MHz FWHM, 23-dB channel isolation, and 5.7-dB gain and can be readjusted with a gain control.

Paper Details

Date Published: 1 September 2004
PDF: 7 pages
Opt. Eng. 43(9) doi: 10.1117/1.1778175
Published in: Optical Engineering Volume 43, Issue 9
Show Author Affiliations
Carmen Vazquez Garcia, Univ. Carlos III de Madrid (Spain)
Salvador E. Vargas, Univ. Carlos III (Spain)
Jose M. Sanchez-Pena, Univ. Carlos III de Madrid (Spain)
Ana Belen Gonzalo, Univ. Carlos III de Madrid (Spain)


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