Title :
Simultaneous four-wave mixing and cross-absorption modulation inside a single EAM for high-speed optical demultiplexing and clock recovery
Author :
Awad, Ehab S. ; Cho, Pak S. ; Goldhar, Julius
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Maryland, College Park, MD, USA
fDate :
7/1/2005 12:00:00 AM
Abstract :
We report a novel technique that utilizes a single electroabsorption modulator (EAM) to perform simultaneous four-wave mixing (FWM) demultiplexing and all-optical timing extraction. The extracted timing, using fast cross-absorption saturation, is used to recover the subharmonic optical clock from 80-Gb/s data. Investigations of the single-pump FWM process in EAM shows a wide wavelength detuning range with almost flat FWM efficiency at large detuning. Enhancement of FWM efficiency with reverse bias of the EAM was observed.
Keywords :
demultiplexing; electro-optical modulation; electroabsorption; high-speed optical techniques; multiwave mixing; optical communication equipment; optical fibre communication; optical saturable absorption; synchronisation; 80 Gbit/s; EAM; FWM; all-optical timing extraction; cross-absorption modulation; cross-absorption saturation; electroabsorption modulator; four-wave mixing; optical demultiplexing; subharmonic clock recovery; wavelength detuning; Clocks; Data mining; Demultiplexing; Four-wave mixing; High speed optical techniques; Nonlinear optics; Optical mixing; Optical modulation; Optical saturation; Timing; Electroabsorption modulator (EAM); four-wave mixing (FWM); nonlinear optical signal processing; optical clock recovery; optical communications;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.848397
