title: 50-Gb/s silicon quadrature phase-shift keying modulator.
abstract: We report the first successful demonstration of quadrature phase-shift keying (QPSK) modulation using two nested silicon Mach-Zehnder modulators. 50-Gb/s QPSK signal is generated with only 2.7-dB optical signal-to-noise ratio penalties from the theoretical limit at a bit-error ratio of 10(-3). This result validates that silicon photonics could be a viable and powerful platform of photonic integrated circuits in coherent optical communications.
authors.affiliation: Bell Labs, Alcatel-Lucent, 791 Holmdel Road, Holmdel, NJ 07733, USA. po.dong@alcatel-lucent.com
authors.forename: Po
authors.initials: P
authors.lastname: Dong
authors.forename: Long
authors.initials: L
authors.lastname: Chen
authors.forename: Chongjin
authors.initials: C
authors.lastname: Xie
authors.forename: Lawrence L
authors.initials: LL
authors.lastname: Buhl
authors.forename: Young-Kai
authors.initials: YK
authors.lastname: Chen