Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1992-10-15
1995-04-18
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359140, 359184, 370 8, 375239, 327 31, 327172, H04B 1000
Patent
active
054083516
ABSTRACT:
An optical communication system includes an optical transmitter which transmits data symbols as pairs of optical pulses having 1) a first predetermined time separation representing a first inputted signal and 2) a second predetermined time separation representing a second inputted signal. The first optical pulse of each pair of pulses may be synchronized to a clock signal of the transmitter. The clock signal operates at a rate which insures that the inter-data symbol spacing is greater than the spacing between the pulses of a symbol pulse pair. The receiver generates a first output signal in response to a pair of pulses having a first predetermined time separation and generates a second output signal in response to a pair of pulses having a second predetermined time separation. The receiver combines the first and second output signal to recover a clock or strobe signal. Sagnac switches are used to implement optical AND circuits utilized in the transmitter and receiver.
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AT&T Corp.
Caccuro John A.
Pascal Leslie
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