Optical fiber shift register

Details Optical fiber shift register Optical fiber shift register

1988-12-05

1990-05-08

Healy, Brian

Electrical pulse counters, pulse dividers, or shift registers: c

Counting or dividing in incremental steps

Beam type tube

350 7614, 350 9615, 350356, 377 64, 377 70, 365 64, 365 76, 365 77, 365 78, 364200, 364713, 307409, G02B 628, G11C 1700, G11C 506, G06F 756

Patent

active

049232673

ABSTRACT:
An optical shift register constructed from at least two optical memory cells connected in cascade, each memory cell having an optical combiner, a 1.times.2 optical switch, a clock, and an optical amplifier, all connected by optical fibers. Each memory cell in the sequence is connected to the next sequential cell by an optical fiber from its output port to the input port of the next sequential cell. The input port of the first optical memory cell serves as the input to the shift register. The output port of the last sequential optical memory cell serves as the output port of the shift register. Each cell is controlled by a clock, all clocks operating at the same rate, but each out of phase with the clock in the next sequential cell. Control signals are provided by said clocks to shift optical pulses from one cell to the next for the enter-shift-exit cycle of the shift register.

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An Ultrafast All-Optical Switch.
R. A. Thompson and P. P. Giordano, "An Experimental Phototonic Time-Slot Interchanger Using Optical Fibers as Reentrant Delay-Line Memories", J. Lightwave Technology, vol. LT-5, pp. 154-162, Jan., 1987.
H. Goto, "Photonic Time-Division Switching Technology", Technical Digest, Topical Meeting on Phototonic Switching, pp. 132-134, Mar., 1987.

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