Wavelength-division multiplexing optical communication apparatus

Details Wavelength-division multiplexing optical communication apparatus Wavelength-division multiplexing optical communication apparatus

1996-12-06

1998-04-28

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Plural

385 1, 385 15, 385 20, 385 31, 359181, 359114, 359180, 359189, G02B 628

Patent

active

057456135

ABSTRACT:
A wavelength division-multiplexing optical communication apparatus and method includes a plurality of modulators for respectively modulating the intensity of a plurality of light rays, each having a different wavelength from one another, with a data signal from a signal source, a wavelength division-multiplexer for combining the light from the modulators, fiber optics for transmitting light from the wavelength division multiple and a wavelength division-multiplexed light receiver for separating the light from the transmission path fiber optics by wavelength (and receiving the separated light, respectively. The light modulators control or select a magnitude of the phase modulation caused at the time of intensity modulation, and the modulator for each light wavelength is separately controlled and selected for the operating point, so as to cause a phase modulation component which minimizes the waveform distortion after transmission through the transmission path fiber optics. Hence, the apparatus is not limited in its wavelength range or transmission distance caused by waveform distortion due to the wavelength dependency of dispersion of transmission path.

REFERENCES:
patent: 4847477 (1989-07-01), Smith
patent: 5394489 (1995-02-01), Koch
patent: 5631758 (1997-05-01), Knox et al.
R.W. Tkach et al.; "One-Third Terabit/s Transmission Through 150 km of Dispersion-Managed Fiber"; European Conference on Optical Communication, ECOC '94, Post-deadline Papers, pp. 45-48.
J.A.J. Fells et al.; "Transmission beyond the dispersion limit using a negative chirp electroabsorption modulator"; Electronics Letters, 7 Jul. 1994, vol. 30, No. 14, pp. 1168-1169.

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