Subvolt operation of electroabsorption modulator integrated with λ/4-shifted DFB laser for 2.4 Gbit/s 135 km transmission

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Abstract
A 2.4Gbit/s 135 km penalty-free conventional fibre transmission experiment was successfully performed with an ultralow modulation voltage of 0.98 V for an InGaAsP electro-absorption modulator/λ/4-shifted DFB laser integrated light source.