Optical threshold devices and methods

Optical waveguides – Having nonlinear property

Reexamination Certificate

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Details

C385S014000, C385S129000, C385S130000, C385S042000, C385S040000, C385S041000, C385S140000, C385S003000

Reexamination Certificate

active

06892016

ABSTRACT:
An optical threshold device including an input, an output, first and second radiation guiding branches, each branch having first and second terminals, at least one of the first and second branches having a non-linear optical element, first and second optical couplers, at least one of the first and second optical couplers having an asymmetric optical coupler, the first optical coupler configured to split an input signal of radiation from the input into a first radiation portion propagating through the first branch and a second radiation portion propagating through the second branch, the second optical coupler configured to combine the first and second radiation portions from the second terminals of the first and second branches, respectively, into an output signal at the output, wherein the non-linear optical element produces a phase shift between the first and second radiation portions and wherein the first and second radiation portions interfere at the second coupler in response to the phase shift.

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patent: 5917979 (1999-06-01), Prucnal
patent: 6643040 (2003-11-01), Shen et al.
patent: 20040037524 (2004-02-01), Shahar et al.

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