Method for switching, amplification and modulation of unidirectional distributively coupled pulses and waves
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United States of America Patent
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Feb 17, 2004
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N/A
app pub date -
Mar 17, 2000
filing date -
Sep 19, 1997
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Expired
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Abstract
The invention concerns the area of nonlinear fiber and integrated optics, to be exact the area of completely optical switches, modulators and optical transistors, in which solitons are used. The technical problem of the invention is the diminution of pump energy fed into optical waveguide, and also increase of sharpness and depth of switching, and gain of optical transistor, and switching speed as well. One variant of the method consists in that into input of tunnel-coupled waveguides having cubic nonlinearity and the second-order dispersion, they feed radiation as fundamental solitons or pulses close to them in amplitude and in shape with various maximum intensity, which is in limits from 0.6I.sub.M up to 1.4I.sub.M, where I.sub.M is the critical intensity. In other variants of the method additionally into the input of the same or other waveguide they feed radiation, which intensity is much less comparable with the soliton's intensity. In particular, this radiation can be as solitons.
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