title: Simultaneous all-optical phase noise mitigation and automatically locked homodyne reception of an incoming QPSK data signal.
abstract: Simultaneous phase noise mitigation and automatic phase/frequency-locked homodyne reception is demonstrated for a 20-32 Gbaud QPSK signal. A phase quantization function is realized to squeeze the phase noise of the signal by optical wave mixing of the signal, its third-order harmonic, and their corresponding delayed variant conjugates, converting the noisy input into a noise-mitigated signal. In a simultaneous nonlinear process, the noise-mitigated signal is automatically phase- and frequency-locked with a "local" pump laser, avoiding the need for feedback or phase/frequency tracking for homodyne detection. Open eye-diagrams are obtained for in-phase and quadrature-phase components of the signal and ∼2  dB OSNR gain is achieved at BER 10-3.
authors.forename: Amirhossein
authors.initials: A
authors.lastname: Mohajerin-Ariaei
authors.forename: Morteza
authors.initials: M
authors.lastname: Ziyadi
authors.forename: Ahmed
authors.initials: A
authors.lastname: Almaiman
authors.forename: Yinwen
authors.initials: Y
authors.lastname: Cao
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Alishahi
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Chitgarha
authors.forename: Ahmad
authors.initials: A
authors.lastname: Fallahpour
authors.forename: Jeng-Yuan
authors.initials: JY
authors.lastname: Yang
authors.forename: Changjing
authors.initials: C
authors.lastname: Bao
authors.forename: Peicheng
authors.initials: P
authors.lastname: Liao
authors.forename: Bishara
authors.initials: B
authors.lastname: Shamee
authors.forename: Youichi
authors.initials: Y
authors.lastname: Akasaka
authors.forename: Motoyoshi
authors.initials: M
authors.lastname: Sekiya
authors.forename: Joseph D
authors.initials: JD
authors.lastname: Touch
authors.forename: Moshe
authors.initials: M
authors.lastname: Tur
authors.forename: Carsten
authors.initials: C
authors.lastname: Langrock
authors.forename: Martin M
authors.initials: MM
authors.lastname: Fejer
authors.forename: Alan E
authors.initials: AE
authors.lastname: Willner