Title :
Design of a wide upstream-bandwidth optical triplexer using three-waveguide interferometer
Author :
Choi, Jun-Seok ; Lee, Hyung-Jong ; Lee, Seo-Young
Author_Institution :
Chonnam Nat. Univ., Gwang-Ju, South Korea
Abstract :
A novel planar lightwave circuit (PLC) triplexer is designed using a three-waveguide interferometer and Mach-Zehnder interferometers. We introduce a full-coupling scheme in the three-waveguide coupler for wide upstream-bandwidth characteristic. Transfer matrix forms for three-waveguide coupler and three-waveguide phase shifter are derived for numerical simulation. Simulation results show that the 1 dB- and 3 dB-bandwidth for the upstream channel are 115 nm and 200 nm, respectively. The proposed triplexer shows low insertion losses of less than 0.6 dB and low crosstalks of less than -28 dB for the two downstream bands, assuming that the waveguide width-error in the PLC fabrication is plusmn0.1 mum.
Keywords :
Mach-Zehnder interferometers; multiplexing equipment; optical communication equipment; optical couplers; optical crosstalk; optical losses; optical phase shifters; optical planar waveguides; Mach-Zehnder interferometers; crosstalks; full-coupling scheme; insertion losses; optical triplexer; planar lightwave circuit triplexer; three-waveguide coupler; three-waveguide interferometer; three-waveguide phase shifter; transfer matrix; upstream bandwidth characteristic; Circuit simulation; Coupling circuits; Insertion loss; Numerical simulation; Optical design; Optical interferometry; Phase shifters; Phase shifting interferometry; Programmable control; Transmission line matrix methods;
Conference_Titel :
Numerical Simulation of Optoelectronic Devices, 2009. NUSOD 2009. 9th International Conference on
Conference_Location :
Gwangju
Print_ISBN :
978-1-4244-4180-8
DOI :
10.1109/NUSOD.2009.5297245
