Title :
Optimal design of planar wavelength circuits based on Mach-Zehnder Interferometers and their cascaded forms
Author :
Wang, Qian ; He, Sailing
Author_Institution :
Centre for Opt. & Electromagn. Res., State Key Lab. of Modern Opt. Instrum., Hangzhou, China
fDate :
3/1/2005 12:00:00 AM
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.
Keywords :
Mach-Zehnder interferometers; channel spacing; genetic algorithms; integrated optics; integrated optoelectronics; multiplexing equipment; optical communication equipment; optical design techniques; optical directional couplers; wavelength division multiplexing; 1450 to 1650 nm; 20 nm; Mach-Zehnder interferometers; broadband coupler; channel spacing; directional couplers; flat-top passband coarse wavelength division demultiplexer; genetic algorithm; planar wavelength circuits; Algorithm design and analysis; Coupling circuits; Directional couplers; Genetic algorithms; Helium; Mach-Zehnder interferometers; Optical filters; Optical interferometry; Optical waveguides; Passband; Coarse wavelength-division demultiplexers; Mach–Zehnder interferometers; genetic algorithm; optical directional couplers; wavelength dependence;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2004.839985
