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Optical Engineering

Investigation of interchannel nonlinear tolerance of 256-Gb/s polarization-division multiplexing return-to-zero 16-ary quadrature amplitude modulation in a hybrid wavelength-division multiplexing transmission system using optical comb
Author(s): Feng Tian; Xiaoguang Zhang; Lixia Xi; Andrew J. Stark; Stephen E. Ralph; Gee-Kung Chang
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Paper Abstract

By applying recirculating frequency shifter technology to generate optical comb as neighboring channels, we have experimentally investigated the interchannel nonlinear tolerance of 256-Gbit/s polarization-division multiplexing return-to-zero 16-ary quadrature amplitude modulation (PDM-RZ-16QAM) in a co-propagation with 32-Gbaud on-off keying, binary phase-shift keying, quadrature phase-shift keying (QPSK) signals in 792-km large-area fiber transmission system. The results show that the experimental back-to-back optical signal-to-noise ratio requirement of 256-Gbit/s (32-GBaud) PDM-RZ-16QAM signal is shifted by 4.8-dB penalty in comparison with the theoretical limits. The cross-phase modulation (XPM) tolerance for 256-Gbit/s PDM-RZ-16QAM in 32-Gbaud phase-modulated neighboring channels is better than in 32-Gbaud intensity-modulated neighbors. Moreover, the performance of XPM tolerance for 256-Gbit/s PDM-RZ-16QAM in 32-Gbaud QPSK neighboring channels is the best among other kinds of modulation neighboring formats.

Paper Details

PDF: 5 pages
Opt. Eng. 53(1) 016111 doi: 10.1117/1.OE.53.1.016111
Published in: Optical Engineering Volume 53, Issue 1, January 2014
Show Author Affiliations
Feng Tian, Beijing Univ. of Posts and Telecommunications (China)
Xiaoguang Zhang, Beijing Univ. of Posts and Telecommunications (China)
Lixia Xi, Beijing Univ. of Posts and Telecommunications (China)
Andrew J. Stark, Georgia Institute of Technology (United States)
Stephen E. Ralph, Georgia Institute of Technology (United States)
Gee-Kung Chang, Georgia Institute of Technology (United States)


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