Optical communications apparatus and optical communications...

Details Optical communications apparatus and optical communications... Optical communications apparatus and optical communications...

2006-03-21

2006-03-21

Chan, Jason (Department: 2633)

Optical communications

Multiplex

Time division

C398S051000, C398S054000, C398S079000

Reexamination Certificate

active

07016611

ABSTRACT:
An optical communications apparatus that is superior in terms of the quality of long-distance transmission. The optical communications apparatus has a plurality of time-division multiplexing devices and an optical multiplexer. Each of time-division multiplexing devices generates optical data sequences by subjecting two systems of optical signal sequences to time-division multiplexing. In each optical data sequence, the duty ratio of the optical pulses is 0.5 or greater, and the phase difference between adjacent optical pulses is π phase. Moreover, the optical multiplexer subjects the optical data sequences input from the plurality of transmitters to wavelength-division multiplexing. Since the duty ratio is set at 0.5 or greater and the phase difference is set at π phase, the soliton interaction of the optical signal sequences and the interaction between channels can be reduced, so that the reliability of the transmitted data is improved.

REFERENCES:
patent: 5737460 (1998-04-01), Damen et al.
patent: 5907421 (1999-05-01), Warren et al.
patent: 5926297 (1999-07-01), Ishikawa et al.
patent: 6091864 (2000-07-01), Hofmeister
patent: 6763197 (2004-07-01), Hirano et al.
T.Yu et al.; “Dispersion-managed soliton interactions in optical fibers”; Optics Letters, vol. 22, No. 11, date published: Jun. 1, 1997.

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