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The uncooled 25-Gbit/s direct modulation of a 1.3-µm horizontal-cavity surface-emitting laser was demonstrated. A fabricated laser, which is directly mountable on a high-frequency coplanar line, exhibited 25-Gbit/s eye openings up to 100°C.
Multiple-wavelength 25-Gb/s operation of a 1.3-μm-range surface-emitting laser array was demonstrated. The fabricated laser array, which consists of nine distributed-feedback (DFB) active stripes operating between 1260 and 1290 nm at 3.7-nm intervals exhibited clear 25-Gb/s eye openings.