Poet Technologies Inc (POET)

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New Patents

Thyristor-based optoelectronic oscillator with tunable frequency and optical phase lock loop employing same
Patent number: 9559636
Abstract: An optoelectronic circuit for producing an optical clock signal that includes an optical thyristor, a waveguide structure and control circuitry. The waveguide structure is configured to split an optical pulse produced by the optical thyristor such that a first portion of such optical pulse is output as part of the optical clock signal and a second portion of such optical pulse is guided back to the optical thyristor to produce another optical pulse that is output as part of the optical clock signal. The control circuitry is operably coupled to terminals of the optical thyristor and receives first and second control signal inputs. The control circuitry is configured to selectively decrease frequency of the optical clock signal based on the first control signal input and to selectively increase frequency of the optical clock signal based on the second control signal input.
Type: Grant
Filed: December 22, 2014
Date of Patent: January 31, 2017
Assignees: Opel Solar, Inc., THE UNIVERSITY OF CONNECTICUT
Inventor: Geoff W. Taylor


Optical phase detector for an optical phase lock loop
Patent number: 9553715
Abstract: An optical phase detector circuit is provided that is suitable for use in an optical phase lock loop. The optical phase detector includes a first optical flip-flop circuit configured to produce a first digital output based on ON/OFF state of a first digital optical input and a digital electrical control signal. A second optical flip-flop circuit is configured to produce a second digital output based on ON/OFF state of a second digital optical input and the digital electrical control signal. An AND gate is operably coupled to both the first and second optical flip-flops. The AND gate produces the digital electrical control signal for supply to the first and second optical flip-flop circuits according to an AND function of the first and second digital outputs produced by the first and second optical flip-flop circuits.
Type: Grant
Filed: December 22, 2014
Date of Patent: January 24, 2017
Assignees: Opel Solar, Inc., THE UNIVERSITY OF CONNECTICUT
Inventor: Geoff W. Taylor