Binary phase-shift keying by coupling modulation of microrings

Wesley D. Sacher, William M.J. Green, Douglas M. Gill, Solomon Assefa, Tymon Barwicz, Marwan Khater, Edward Kiewra, Carol Reinholm, Steven M. Shank, Yurii A. Vlasov, Joyce K.S. Poon

Research output: Contribution to journalArticlepeer-review


We propose a coupling-modulated microring in an add-drop configuration for binary phase-shift keying (BPSK), where data is encoded as 0 and radian phase-shifts on the optical carrier. The device uses the 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.

Original languageEnglish (US)
Pages (from-to)20252-20259
Number of pages8
JournalOptics Express
Issue number17
StatePublished - Aug 25 2014
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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