Soliton generator

Details Soliton generator Soliton generator

1991-12-16

1992-10-20

Healy, Brian

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

385 3, 385 9, 385 45, 385 40, 385132, 356345, 359181, 359184, 359188, G02B 610, G01B 902, G02F 100

Patent

active

051577445

ABSTRACT:
It has been determined that optical fibers possess a small amount of nonlinearity and, therefore, they are not exactly linear waveguides. This small amount of nonlinearity enables certain special pulse shapes to establish themselves and travel long distances without changing shape. These special pulse shapes are called solitons. This invention relates to a device for generating solitons by amplitude modulating an optical signal with separate in-phase electrical signals of different harmonically related frequencies. Specifically, an amplitude modulator such as a Y junction Mach-Zehnder interferometer has multiple sets of distributed electrodes. The interferometer has a set of electrodes for each electrical signal of a specific frequency. Thus, if three separate signals of harmonically related frequencies are used to amplitude modulate an optical signal, then the interferometer has three sets of electrodes located between the Y junctions of the Mach-Zehnder interferometer. The structure of a separate set of electrodes for each of the signals results in a soliton generator which avoids the prior art problem of signal loss caused by combining many high frequency signals into a composite signal and the resulting need for a relatively expensive amplifier capable of uniformly amplifying the multioctive composite signal.

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patent: 5044714 (1991-09-01), Taylor et al.

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