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FDMA-FSK star network with a tunable optical filter demultiplexer

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4 Author(s)
Kaminow, I.P. ; AT&T Bell Lab., Holmdel, NJ, USA ; Iannone, P.P. ; Stone, J. ; Stulz, L.W.

An optical frequency-division-multiple-access (FDMA) star network is analyzed and demonstrated experimentally using two 45-Mb/s frequency-shift-keyed (FSK) laser channels at 1.5 μm. A tunable fiber Fabry-Perot (FFP) filter is used to select channels and convert FSK to intensity modulation for direct detection. The analysis predicts and experiment supports a minimum channel spacing of about six times bit rate B for a single FFP. These constraints are similar to those for more complex heterodyne demultiplexing. Estimates show that a network with 1000 users, independent of bit rate, is feasible with a tandem FFP. For B=1 Gb/s per channel the network capacity would be 1 Tb/s

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Lightwave Technology, Journal of  (Volume:6 ,  Issue: 9 )