Optical Phase Detector for an Optical Phase Lock Loop

摘要

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.

主权项

1. An optical phase detector circuit for an optical phase lock loop, the optical phase detector comprising:
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 configured to produce a second digital output based on ON/OFF state of a second digital optical input and said digital electrical control signal; and an AND gate, operably coupled to both said first and second optical flip-flops, that produces said digital electrical control signal for supply to said first and second optical flip-flop circuits according to an AND function of the first and second digital outputs produced by said first and second optical flip-flop circuits.