Ultrahigh-Speed OTDM Transmission beyond 1 Tera Bit-Per-Second Using a Femtosecond Pulse Train

Masataka NAKAZAWA  Takashi YAMAMOTO  Koichi Robert TAMURA  

IEICE TRANSACTIONS on Electronics   Vol.E85-C   No.1   pp.117-125
Publication Date: 2002/01/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Issue on Ultrafast Optical Signal Processing and Its Application)
Category: OTDM Transmission System, Optical Regeneration and Coding
OTDM transmission,  mode-locked lasers,  femtosecond pulse generation,  pulse compression,  NOLM,  

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Progress on a single wavelength channel OTDM terabit/s transmission is described. In particular, we focus on 1.28 Tbit/s OTDM transmission over 70 km which we realized recently. A pre-chirping technique using a high speed phase modulator is emphasized to simultaneously compensate for third- and fourth-order dispersion. The input pulse width was 380 fs, and the pulse broadening after a 70 km transmission was as small as 20 fs. All 128 channels time-division-demultiplexed to 10 Gbit/s had a bit error rate of less than 110-9, in which we employed a lot of new technique for pulse generation, dispersion compensation and demultiplexing. These techniques help pave the path for OTDM technology of the 21 century.