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Gigabits-per-second optical interconnection networks: fault-tolerance with and without optical amplifiers

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2 Author(s)
Tonguz, O.K. ; Dept. of Electr. & Comput. Eng., State Univ. of New York, Buffalo, NY, USA ; Falcone, K.A.

This paper quantifies the power budget concerns with respect to the number of consecutive faults that must be tolerated before a network can fail. In particular, it is shown that multiple consecutive failures may have a serious adverse effect on the speed of gigabit optical networks. Results indicate that, with 20 nodes using simple direct-detection, only passive star networks can operate at Gb/s in the event of multiple consecutive faults. Use of optical preamplifiers is shown to remedy this shortcoming substantially: even with 3 consecutive node failures, optical networks with passive star couplers or single couplers can achieve Gb/s transmission speed for a node spacing of up to 2.3 km

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Lightwave Technology, Journal of  (Volume:12 ,  Issue: 2 )