Single-Channel 1.28 Tbit/s-525 km DQPSK Transmission Using Ultrafast Time-Domain Optical Fourier Transformation and Nonlinear Optical Loop Mirror

Pengyu GUAN  Hans Christian Hansen MULVAD  Yutaro TOMIYAMA  Toshiyuki HIRANO  Toshihiko HIROOKA  Masataka NAKAZAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.2   pp.430-436
Publication Date: 2011/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.430
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Extremely Advanced Optical Transmission Technologies and Transmission Optical Fiber Technologies towards Exabit Era)
Category: 
Keyword: 
high-speed optical pulse transmission,  optical Fourier transformation,  ultrashort optical pulse,  optical phase modulation,  optical time-division multiplexing,  differential quadrature phase shift keying,  

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Summary: 
We demonstrate a single-channel 1.28 Tbit/s-525 km transmission using OTDM of subpicosecond DQPSK signals. In order to cope with transmission impairments due to time-varying higher-order PMD, which is one of the major limiting factors in such a long-haul ultrahigh-speed transmission, we newly developed an ultrafast time-domain optical Fourier transformation technique in a round-trip configuration. By applying this technique to subpicosecond pulses, transmission impairments were greatly reduced, and BER performance below FEC limit was obtained with increased system margin.