Optical time slot interchanger using one-bit memory cells

Details Optical time slot interchanger using one-bit memory cells Optical time slot interchanger using one-bit memory cells

1988-12-23

1990-05-01

Orsino, Joseph A.

Multiplex communications

Wide area network

Packet switching

370 4, 455600, H04J 1400, H04J 1408, H04B 1000

Patent

active

049224794

ABSTRACT:
An optical time slot interchanger which interchanges one optical pulse at a time in a bit interleaved format. The optical time slot interchanger is constructed from an N-bit serial-to-parallel converter and N optical memory cells, each of said optical memory cells being optically coupled to a parallel output port of said optical-to-serial converter. The ouputs of all N optical memory cells are optically coupled to form a single output port for the time slot interchanger. The optical time slot interchanger has a single input port to receive serially a frame of N optical pulses and a single output to present serially said frame of pulses with interchanged time slots. As a frame of N optical pulses enters the optical time slot interchanger, they are shifted and stored in said optical serial-to-parallel converter under the control of clock means. The optical pulses are then shifted to optical memory cells to await serial output in a time slot interchange under control of other clock signals.

REFERENCES:
patent: 3739173 (1973-06-01), Broussard
patent: 4608682 (1986-08-01), Nagashima
patent: 4748617 (1988-05-01), Drenlo
patent: 4761060 (1988-08-01), Sawano
patent: 4811210 (1989-03-01), McAulay
An Ultra Fast All-Optical Switch.
R. A. Thompson and P. P. Giordiano, "An Experimental Photonic 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", Technology Digest, Topical Meeting on Photonic Switching, pp. 132-134, Mar. 1987.

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