A high-performance 1.3 µm InGaAlAs electroabsorption modulator integrated with a DFB laser for the metro-area 100 Gbit/s Ethernet system (100GBASE-LR4 and -ER4) has been developed. 40 km transmission under 25 Gbit/s operation on singlemode fibre that is required for 100GBASE-ER4 application at 40°C is demonstrated for the first time.
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Fujisawa et al. (2009) studied this question.
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