title: Generation of 21.3 Gbaud 8PSK signal using an SOA-based all-optical phase modulator.
abstract: We describe a novel SOA-based all-optical pure-phase modulator, and show how deleterious cross-gain modulation from the SOAs can be suppressed by utilizing an integrated interferometer structure. We experimentally demonstrate the use of the optical gate as a π/4 phase modulator producing 21.3 Gbaud 8PSK from 21.3 Gbit/s OOK and 21.3 Gbaud QPSK inputs. The modulator produces 3 dB of gain and coherent detection-based bit error rate measurements indicate a 2.4 dB excess penalty.
authors.affiliation: Tyndall National Institute & Department of Physics, University College Cork, Lee Maltings, Cork, Ireland. james.dailey@tyndall.ie
authors.forename: J M
authors.initials: JM
authors.lastname: Dailey
authors.forename: R P
authors.initials: RP
authors.lastname: Webb
authors.forename: R J
authors.initials: RJ
authors.lastname: Manning