All-optical bi-stable devices

Details All-optical bi-stable devices All-optical bi-stable devices

2007-01-09

2007-01-09

Pak, Sung (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling function

C385S014000, C385S031000

Reexamination Certificate

active

11431493

ABSTRACT:
An all-optical bi-stable device includes first and second comparators, each having an activating input, a threshold input, and a clamping output; a first optical path between the first clamping output and the second threshold input; a second optical path between the second clamping output and the first threshold input; at least one tapping device; and at least one coupling device. The comparators are arranged to produce at the clamping output either a high-level clamped output signal or a low-level output signal, based on a comparison of signals received at the activating and threshold inputs. The first and second optical paths may create one of two stable states in which one of the comparators produces a high-level clamped output signal and the other comparator produces a low-level output signal. The coupling device may flip between the two stable states by converting the high-level clamped output signal into the low-level output signal.

REFERENCES:
patent: 4910737 (1990-03-01), Payne et al.
patent: 5117471 (1992-05-01), Furstenau
patent: 5414548 (1995-05-01), Tachikawa et al.
patent: 5543631 (1996-08-01), Weinberger
patent: 5694114 (1997-12-01), Udd
patent: 5917979 (1999-06-01), Prucnal
patent: 6788840 (2004-09-01), Stewart et al.

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