We discuss the performance of a multichannel 2×10 Gbit/s polarization-multiplexed differential phase-shift keying transmission system. Through simulations and transmission experiments we find that, despite the constant power envelope of non-return-to-zero phase-shift keying modulation formats, polarization multiplexing strongly reduces the nonlinear tolerance and transmission performance at a 2×10 Gbit/s line rate with multichannel transmission. This results in a 10 dB power penalty when comparing single- and nine-channel transmission. Additionally, multichannel impairments in differential phase-shift keying and on-off keying are compared for 2×10 Gbit/s polarization-multiplexed transmission.
© 2005 Optical Society of America
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4080) Fiber optics and optical communications : Modulation
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
D. van den Borne, S. L. Jansen, G. D. Khoe, H. de Waardt, S. Calabrò, P. M. Krummrich, W. Schairer, and C.-J. Weiske, "Interchannel nonlinear transmission penalties in polarization-multiplexed 2×10 Gbit/s differential phase-shift keying transmission," Opt. Lett. 30, 1443-1445 (2005)