Title :
Bidirectional Data Injection Operation of Hybrid Integrated SOA–MZI All-Optical Wavelength Converter
Author :
Hattori, Masaharu ; Nishimura, Kohsuke ; Inohara, Ryo ; Usami, Masashi
Author_Institution :
KDDI R&D Labs. Inc, Fujimino
Abstract :
A bidirectional data signal input scheme of a semiconductor optical amplifier--Mach-Zehnder interferometer (SOA-MZI) wavelength converter was proposed and experimentally verified for a nonreturn-to-zero (NRZ)-format signal. Theoretical analyses reveal that it is possible to mitigate the patterning effect induced by cross-gain modulation (XGM) by utilizing the difference of the ratio between the XGM and cross-phase modulation on the injection directions of data signals. A hybrid integrated SOA-MZI all-optical wavelength converter, in which the coupling loss between the SOA and the silica waveguide was as small as 1 dB owing to a unique active alignment technique, was used for the experiment. We have verified the superior characteristics of the proposed operation scheme for the first time. Error-free wavelength-conversion operation for an NRZ signal at 40 Gb/s was confirmed
Keywords :
Mach-Zehnder interferometers; integrated optics; optical communication equipment; optical fibre communication; optical losses; optical modulation; optical waveguides; optical wavelength conversion; semiconductor optical amplifiers; silicon compounds; 1 dB; 40 Gbit/s; Mach-Zehnder interferometer; SiO2; all-optical wavelength converter; bidirectional data injection; coupling loss; cross-gain modulation; error-free wavelength conversion; hybrid wavelength converter; integrated SOA-MZI wavelength converter; nonreturn-to-zero-format signal; patterning effect; semiconductor optical amplifier; silica waveguide; Nonlinear optics; Optical interferometry; Optical modulation; Optical waveguides; Optical wavelength conversion; Pattern analysis; Semiconductor optical amplifiers; Signal analysis; Silicon compounds; Stimulated emission; All-optical wavelength converter; bidirectional input; cross-gain modulation (XGM); cross-phase modulation (XPM); hybrid integration; semiconductor optical amplifier (SOA);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2006.888232
