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Proceedings Paper

Multimode Switching Components For Multi-Terminal Links
Author(s): Richard A. Soref
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Paper Abstract

The use of active components for data distribution in multi-terminal fiber networks is reviewed in this paper. Our approach is to place electro-optic switches at nodes of the network. These signal-routing devices are interconnected by individual strands of multimode fiber. We shall present recent results on multimode switching in the areas of optical data busing, multiplexing, and circuit switching. A new "mirror terminal" has been developed as a low-loss means of coupling information on and off a serial bus, while time-division multi-plexing has been implemented with multipole LiTaO3 switches. The "optical crossbar" or matrix is a first step toward telecommunication switching. The matrix provides communica-tion between two groups of N terminals. This can also be done with a passive star coupler, but the matrix does not suffer a 1/N power-division loss, it sets up N independent "con-versations" simultaneously, and the circuits can be reconfigured rapidly. Multimode crossbars 3 x 2 in size are now operating in our laboratory. Fiber guides are butt-coupled to the crossbar crystal at an angle in order to collimate the 0.15-NA fiber light in the crossbar.

Paper Details

Date Published: 21 December 1978
PDF: 10 pages
Proc. SPIE 0150, Laser and Fiber Optics Communications, (21 December 1978); doi: 10.1117/12.956710
Show Author Affiliations
Richard A. Soref, Sperry Research Center (United States)

Published in SPIE Proceedings Vol. 0150:
Laser and Fiber Optics Communications
Monte Ross, Editor(s)

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