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B-ISDN waits for photonics to deliver

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3 Author(s)
Matsunaga, T. ; NTT Commun. Switching Labs., Tokyo, Japan ; Yukimatsu, K. ; Aoki, T.

A variety of photonic switching techniques have been studied from the viewpoint of expanding switching-mode throughput. The basic issue discussed is how the high bandwidths of optical devices can be applied to switching nodes. It is shown that a high time-domain bandwidth allows high-speed signal transmission without waveform distortion, a high frequency-domain bandwidth allows a system to accommodate a large number of channels, which results in a high-capacity system, and a high space-domain bandwidth allows high-density interconnections in free space and resolves the pin-out bottleneck of LSIs and multichip modules (MCMs). Photonic space-division switching, photonic ATM switching, photonic frequency-division switching, and photonic free-space switching methods are described.<>

Published in:

Circuits and Devices Magazine, IEEE  (Volume:9 ,  Issue: 3 )

Date of Publication:

May 1993

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