Optical linear feedback shift register

Details Optical linear feedback shift register Optical linear feedback shift register

1991-11-05

1993-05-04

Coles, Sr., Edward L.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

356345, 385 16, H04B 1012

Patent

active

052087050

ABSTRACT:
An optical linear feedback shift register arrangement includes an optical encoding means implemented using a modified Sagnac switch. The encoding means encodes a received optical clock signal with a value derived from an exclusive-or of a first and second delayed version of an encoded signal received, respectively, at a first and second control ports. The resulting encoded clock signal, appearing at an output port, is then coupled through a first delay means to said first control port and coupled through a second delay means to said second control port. In another arrangement, an optical communication system utilizes the above-described linear feedback shift register to encode a data signal at a transmitter location and uses an identical linear feedback shift register at the receiver location to decode the encoded data signal.

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