Open AccessBinary phase-shift keying by coupling modulation of microrings
Author(s) -
Wesley D. Sacher,
William M. J. Green,
Douglas M. Gill,
Solomon Assefa,
Tymon Barwicz,
Marwan Khater,
E. Kiewra,
Carol Reinholm,
Steven M. Shank,
Yurii A. Vlasov,
Joyce K. S. Poon
Publication year - 2014
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.22.020252
Subject(s) - phase shift keying , optics , keying , physics , modulation (music) , phase modulation , interferometry , quadrature amplitude modulation , mach–zehnder interferometer , phase (matter) , coupling (piping) , materials science , bit error rate , telecommunications , computer science , phase noise , channel (broadcasting) , quantum mechanics , acoustics , metallurgy
We propose a coupling-modulated microring in an add-drop configuration for binary phase-shift keying (BPSK), where data is encoded as 0 and π radian phase-shifts on the optical carrier. The device uses the π radian phase-flip across the zero coupling point in a 2 × 2 Mach-Zehnder interferometer coupler to produce the modulation. The coupling-modulated microring combines the drive power reduction of resonant modulators with the digital phase response of Mach-Zehnder BPSK modulators. A proof-of-concept device was demonstrated in silicon-on-insulator, showing differential binary phase-shift keying operation at 5 and 10 Gb/s.