Optical fibre communication system
AssigneeBTG International Limited
InventorsNicholas John Doran, Jeroen Henricus Bernardus Nijhof
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Abstract
A soliton or soliton-like pulse-based optical communication system comprises a length of optical fibre divided into a plurality of sections arranged so that the average dispersion of the length of fibre is significantly different from the dispersion of each section.
Claims17
A soliton or soliton-like pulse-based optical communication system comprising a length of optical fiber divided into a plurality of sections wherein the average dispersion of the length of fiber is significantly different from the dispersion of each section, and wherein said system is a wavelength division multiplex system having a plurality of channels operable about a wavelength having substantially zero dispersion.
A soliton or soliton-like pulse-based optical communication system comprising a length of optical fiber divided into a plurality of sections wherein the average dispersion of the length of fiber is significantly different from the dispersion of each section, and wherein the system excludes channels having substantially equal group velocities.
A soliton or soliton-like pulse-based optical communication system comprising:
- a length of optical fiber divided into a plurality of sections wherein the average dispersion of the length of fiber is significantly different from the dispersion of each section, and wherein the system excludes channels having substantially equal group velocities;
- and
- means for inhibiting coalescence of solitons in said channels having substantially equal group velocities.
A soliton or soliton-like pulse-based optical communication system comprising a length of optical fiber divided into a plurality of sections wherein the average dispersion of the length of fiber is significantly different from the dispersion of each section, and wherein the system includes at least one Bragg grating as a dispersion compensation element.
A soliton or soliton-like pulse-based optical communication system comprising:
- a length of optical fiber divided into a plurality of sections wherein the average dispersion of the length of fiber is significantly different from the dispersion of each section, and
- a bandpass filter as a component of a normal dispersive element where the bandwidth is minimum.
A soliton or soliton-like pulse-based communication system comprising a length of optical fiber divided into a plurality of sections, wherein the average dispersion of the length of fiber is significantly different from the dispersion of each section, wherein the length of each fiber section is specified by the pulse duration (τ) and the fiber dispersion parameter {umlaut over (β)}.
A wavelength division multiplex optical communication system comprising:
- an optical fiber comprising a sequence of fiber sections, the sequence comprising an alternating sequence of a first section type having a normal dispersion ({umlaut over (β)}1) followed by a second section type having an anomalous dispersion ({umlaut over (β)}2), and wherein the average dispersion of the optical fiber is significantly closer to zero than the magnitudes of the first and second dispersions;
- and
- a plurality of wave length channels positioned about a wave length having near zero dispersion in the optical fiber.
An optical communication system arranged as a wavelength division multiplex system, and including an optical fiber dispersion management system comprising a sequence of fiber sections, the sequence comprising an alternating sequence of a first section type followed by a second section type,
- said first section type having an associated length (L1), a first anomalous dispersion ({umlaut over (β)}1) and a first non-linear coefficient (γ1), and of a second type having a second associated length (L2), a second normal dispersion ({umlaut over (β)}2) and a second non-linear coefficient (γ2),
- wherein the magnitudes of the first and second dispersions are significantly greater than the magnitude of the average dispersion of the fiber, whereby a soliton propagates through the system alternately expanding and compressing in shape as it propagates from one fiber section to the next,
- and wherein the average dispersion of the dispersion management system is zero.
An optical communication system arranged as a wavelength division multiplex system, and including an optical fiber dispersion management system comprising a sequence of fiber sections, the sequence comprising an alternating sequence of a first section type followed by a second section type,
- said first section type having an associated length (L1), a first anomalous dispersion ({umlaut over (β)}1) and a first non-linear coefficient (γ1), and of a second type having a second associated length (L2), a second normal dispersion ({umlaut over (β)}2) and a second non-linear coefficient (γ2),
- wherein the magnitudes of the first and second dispersions are significantly greater than the magnitude of the average dispersion of the fiber, whereby a soliton propagates through the system alternately expanding and compressing in shape as it propagates from one fiber section to the next,
- and wherein the average dispersion of the dispersion management system is normal.
Dependencies are inferred from the claim text.