Title :
Optical phase conjugation for ultra long-haul phase-shift-keyed transmission
Author :
Jansen, S.L. ; van den Borne, D. ; Spinnler, B. ; Calabrõ, S. ; Suche, H. ; Krummrich, P.M. ; Sohler, W. ; Khoe, G.D. ; de Waardt, H.
Author_Institution :
Commun. Technol. Basic Res. & Applic., Univ. of Technol., Eindhoven, Netherlands
Abstract :
Nonlinear phase noise (Gordon-Mollenauer phase noise) can limit the transmission distance for phase-shift-keyed modulation formats. In this paper, the compensation of nonlinear phase noise by a midlink optical phase conjugation (OPC) is studied. A proof-of-principle experiment is presented showing an over 4-dB improvement in Q factor when OPC is employed in a differential phase-shift-keying (DPSK) system. Also, an ultra long-haul OPC-based differential quadrature phase-shift-keying (DQPSK) transmission experiment is studied to show the impact of self-phase modulation (SPM)-induced impairments, including nonlinear phase noise, in a transmission line. OPC results in a 44% increase in transmission distance when compared to a "conventional" transmission system using dispersion compensating fiber (DCF) for chromatic dispersion compensation.
Keywords :
Q-factor; differential phase shift keying; optical fibre communication; optical fibre dispersion; optical noise; optical phase conjugation; phase noise; self-phase modulation; Gordon-Mollenauer phase noise; Q factor; chromatic dispersion compensation; differential phase-shift-keying; differential quadrature phase-shift-keying; dispersion compensating fiber; midlink OPC; modulation formats; nonlinear phase noise; optical phase conjugation; phase noise compensation; phase-shift-keyed transmission; self-phase modulation; ultralong-haul transmission; Differential quadrature phase shift keying; Fiber nonlinear optics; Nonlinear optics; Optical modulation; Optical noise; Phase modulation; Phase noise; Phase shift keying; Q factor; Transmission lines; Alternative modulation formats; differential phase-shift keying (DPSK); differential quadrature phase-shift keying (DQPSK); dispersion compensation; fiber optics communications; nonlinear phase noise; periodically poled lithium niobate (PPLN); phase conjugation; phase-shift keying; spectral inversion;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2005.862481
