Open AccessPhase-shift-keying and on-off-keying with improved performances using electroabsorption modulators with interferometric effects
Author(s) -
Ilnam Kang
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.001467
Subject(s) - keying , extinction ratio , optics , on off keying , modulation (music) , phase modulation , phase shift keying , minimum shift keying , interferometry , amplitude and phase shift keying , materials science , physics , telecommunications , bit error rate , computer science , phase noise , channel (broadcasting) , wavelength , acoustics
We present methods of optical modulation employing electroabsorption in an interferometric structure. The interferometric operation enables electroabsorption modulators for phase-shift keying and allows generation of on-off-keying signals with much improved extinction ratios. We demonstrate 40-Gb/s phase-shift-keying modulation, and up to 8.7 dB improvement in extinction ratio in 40-Gb/s on-off-keying modulation with 0.8V driving voltage using a commercial electroabsorption modulator. Methods of applying electroabsorption modulators for high spectral-efficiency formats generation are also proposed.