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Single-laser high-selectivity bidirectional transmission system for local-area-network applications

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2 Author(s)
Olsson, N.A. ; AT&T Bell Laboratories, Holmdel, USA ; Buhl, L.L.

Bidirectional transmission at 90Mbit/s over 30 km of fibre using a single laser source is demonstrated. At the subscriber end, a narrowband resonant optical amplifier serves not only as amplifier, but also as detector, modulator and optical filter. The coherent Rayleigh noise, encountered in previous single-laser bidirectional systems, is eliminated by using a subcarrier modulation scheme. The demonstrated capacity is more than an order of magnitude improvement over similar systems.

Published in:

Electronics Letters  (Volume:23 ,  Issue: 2 )