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Passive equalisation of four 2.5 Gbit/s WDM channels over 1000 km using notch filters

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5 Author(s)
Hwang, S.-M. ; Dept. of Electr. Eng. Syst., Univ. of Southern California, Los Angeles, CA ; Zou, X.Y. ; Huang, S.H. ; Shieh, W.
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The authors experimentally demonstrate passive equalisation of the non-uniform gain of cascaded EDFAs over a 7.4 nm wavelength range by periodically using notch filters along a 1000 km transmission link. The 1000 km equalised transmission was accomplished using a recirculating loop and a single intra-loop notch filter. The signal power differential among the four WDM channels is reduced from 19 to 4 dB

Published in:

Electronics Letters  (Volume:32 ,  Issue: 7 )