Optical communications systems

Details Optical communications systems Optical communications systems

1990-10-30

1993-04-06

Ullah, Akm E.

Optical waveguides

With optical coupler

Plural

G02B 626

Patent

active

052010171

ABSTRACT:
Soliton-type interaction is eliminated in optical fibre communications system by making the fibre appear to be a passive optical pipe to a signal to be transmitted along it. In particular, the signal to be transmitted is intensity modulated and at a first wavelength which is greater than the minimum dispersion wavelength of the fibre by a predetermined amount. This signal is launched simultaneously into the fibre with a signal of dark pulses of the same format but at a wavelength less than the minimum dispersion wavelength by the predetermined amount. As a result the light transmitted in the fibre is of constant intensity and soliton-type effects, which rely on intensity variation for their formation, do not occur.

REFERENCES:
patent: 4741587 (1988-05-01), Jewell et al.
patent: 4881788 (1989-11-01), Doran
patent: 4932739 (1990-06-01), Islam
patent: 4962987 (1990-10-01), Doran
Patent Abstract of Japan, vol. 12, No. 310 (E 648-(3157) and JP-A-63-076532, 6 Apr. 1988.
Electronics Letters, vol. 21, No. 24, 21 Nov. 1985, Stevenge GB. pp. 1133-1134 Chu et al., "Mutual Interaction Beetween of Unequal Amplitudes in Optical Fibre".

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