Optical waveguides – With optical coupler – Particular coupling function
Patent
1997-11-03
2000-05-09
Sanghavi, Hemang
Optical waveguides
With optical coupler
Particular coupling function
385 24, 385 49, 359124, 372 96, 372 99, G02B 626
Patent
active
060614854
ABSTRACT:
A method for wavelength division multiplexing including the steps of providing at least two annular waveguide or spatially donut mode and spectrally single mode vertical cavity surface emitting lasers for operating in a single high order transverse mode. In addition, provided is a multimode fiber based data link. The spatially donut mode and spectrally single mode vertical cavity surface emitting lasers are coupled to the multimode fibers through wavelength multiplexing techniques. During operation, a modulation voltage or modulation current is applied to the spatially donut mode and spectrally single mode vertical cavity surface emitting lasers thereby exciting higher order modes in the multimode fiber based data link and thus achieving either wavelength division multiplexing or de-multiplexing over a large transmission distance.
REFERENCES:
patent: 4834481 (1989-05-01), Lawson et al.
patent: 5394489 (1995-02-01), Koch
patent: 5963576 (1999-10-01), Claisse et al.
Hartman Davis H.
Jiang Wenbin
Lebby Michael S.
Cushwa Benjamin
Motorola Inc.
Parsons Eugene A.
Sanghavi Hemang
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