Optical switching system

Details Optical switching system Optical switching system

1991-07-31

1993-04-27

Coles, Sr., Edward L.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359117, 359139, H04J 1402

Patent

active

052067530

ABSTRACT:
An optical switching unit requiring no optical-to-electrical conversions on optical data paths being switched through the optical switching unit. The optical switching unit receives optical data information from one terminal and switches it to another terminal. The optical switching unit frame synchronizes the data transmission timing of the terminals in accordance with the data transmission timing of the optical switching unit. This frame synchronization eliminates the need to provide data buffering and frame synchronization in the optical switching unit. The optical switching unit comprises an optical network, system clock, optical input interfaces for receiving information from terminals, and optical output interfaces for transmitting information to terminals. The system clock determines the timing of each terminal using information transmitted to an optical input interface by the terminal. If the timing of a terminal does not match that of the system clock, the system clock blocks the transfer of data information by the optical input interface to the optical network and transmits timing information to the terminal via an optical output interface. If the timing matches, the system clock signals the optical input interface to communicate the data information to the optical network which switches the data information to optical output interfaces for transmission to terminals.

REFERENCES:
patent: 4736462 (1988-04-01), Joel, Jr.
patent: 5005166 (1991-04-01), Suzuki et al.
N. K. Ailawadi et al., "Broadband Photonic Switching Using Guided-Wave Fabrics", IEEE LTS, May 1991, vol. 2, No. 2, pp. 38-43.

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