title: Monolithically integrated dual-channel coherent receiver with widely tunable local oscillator for 100 Gbps dual-polarization quadrature phase shift keying applications.
abstract: We report implementation of a monolithically integrated 100 Gbps dual-polarization quadrature phase shift keying (DP-QPSK) wavelength tunable coherent receiver on a 1  mm×3  mm die that consists of a tunable C-Band local oscillator with a 40 nm range, eight 30 GHz photodetectors, and two parallel 90° optical hybrids. A BER of 10(-3) with an OSNR of 7.5 dB operating at 50 Gbps NRZ-QPSK data per channel is reported.
authors.forename: Phillip J
authors.initials: PJ
authors.lastname: Skahan
authors.forename: Sarat
authors.initials: S
authors.lastname: Gundavarapu
authors.forename: Kimchau N
authors.initials: KN
authors.lastname: Nguyen
authors.forename: Douglas M
authors.initials: DM
authors.lastname: Baney
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Blumenthal