title: High phase noise tolerant pilot-tone-aided DP-QPSK optical communication systems.
abstract: In this paper we experimentally demonstrate a novel, high phase-noise tolerant, optical dual polarization (DP) quadrature phase-shift keying (QPSK) communication system based on pilot-tone-aided phase noise cancellation (PNC) algorithm. Vertical cavity surface emitting lasers (VCSELs) with approximate 300 MHz linewidth are used as transmitters and local oscillators for coherent detection of optical DP-QPSK signals. The proposed system, with central wavelength at 1540.68 nm, operates at 40 Gb/s over 80 km single mode fiber (SMF) as part of a passive optical network (PON). The deployment of pilot-tone-aided PNC algorithm guarantees a bit error rate (BER) performance below the forward error correction (FEC) threshold. Moreover, we also evaluate a novel digital signal processing (DSP) algorithm for adaptive pilot tone detection.
authors.affiliation: DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark. xuzhn@fotonik.dtu.dk
authors.forename: Xu
authors.initials: X
authors.lastname: Zhang
authors.forename: Xiaodan
authors.initials: X
authors.lastname: Pang
authors.forename: Lei
authors.initials: L
authors.lastname: Deng
authors.forename: Darko
authors.initials: D
authors.lastname: Zibar
authors.forename: Idelfonso Tafur
authors.initials: IT
authors.lastname: Monroy
authors.forename: Richard
authors.initials: R
authors.lastname: Younce
mesh_terms: D000465:Algorithms; D003195:Computer Communication Networks / Q000295:instrumentation*; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D059629:Signal-To-Noise Ratio; D013685:Telecommunications / Q000295:instrumentation*