Apparatus for compensating chromatic dispersion in optical fibers
First Claim
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1. Apparatus for compensating a predetermined amount of chromatic dispersion in a lightwave signal, the apparatus comprising:
- first means for converting the lightwave signal from a first spatial mode to a second spatial mode, the second spatial mode being a higher order spatial mode than the first spatial mode; and
dispersive waveguide means supporting propagation of the lightwave signal substantially in the second spatial mode and connected to an output of the first converting means for compensating dispersion of the lightwave signal by inducing a first amount of chromatic dispersion substantially equal in magnitude, and opposite in sign, to the predetermined amount of chromatic dispersion.
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Abstract
Chromatic dispersion is efficiently compensated in a compact device by combining a spatial mode converter with a dispersive waveguide having a dispersion characteristic of substantially equivalent magnitude, and opposite sign, to the desired amount of dispersion to be compensated. The spatial mode converter exchange the optical energy from one propagating spatial mode to another spatial mode whose propagation is supported by the multimode or dual-mode fiber. This apparatus is applicable to lightwave repeaters, regenerators, transmitters, and receivers.
62 Citations
20 Claims
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1. Apparatus for compensating a predetermined amount of chromatic dispersion in a lightwave signal, the apparatus comprising:
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first means for converting the lightwave signal from a first spatial mode to a second spatial mode, the second spatial mode being a higher order spatial mode than the first spatial mode; and dispersive waveguide means supporting propagation of the lightwave signal substantially in the second spatial mode and connected to an output of the first converting means for compensating dispersion of the lightwave signal by inducing a first amount of chromatic dispersion substantially equal in magnitude, and opposite in sign, to the predetermined amount of chromatic dispersion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Apparatus for compensating a predetermined amount of chromatic dispersion in a lightwave signal, the apparatus comprising:
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dispersive waveguide means supporting propagation of the lightwave signal substantially in a first spatial mode and responsive to the lightwave signal for compensating dispersion of the lightwave signal by inducing a first amount of chromatic dispersion substantially equal in magnitude, and opposite in sign, to the predetermined amount of chromatic dispersion; and means for converting the lightwave signal from the second spatial mode to a first spatial mode, the second spatial mode being a higher order spatial mode than the first spatial mode. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification