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Recent challenges facing research and development on high-speed devices and their integration for 100 GbE are explained. The low-power-consumption technology and optical-integration technology are considered to be the key solutions to face these challenges.
We describe an aspheric-microlens-integrated high-performance PIN photodiode, which exhibits high speed (35 GHz), high responsivity (0.8 A/W), and large alignment tolerance (26 mum) for direct coupling to a flat-ended standard single-mode fiber.
A novel 1.3-mum surface-emitting laser integrated with a monolithic InP bulk lens was demonstrated. The laser achieved very narrow far-field angles of around 2deg leading to a -2.7 dB direct coupling to a single-mode fiber.
We developed a high-speed (over 30 GHz) and high-responsivity (nearly 0.8 A/W) back-illuminated PD with a newly developed high reflective reflector, and successfully demonstrated an error free 25-Gbps 10-km SMF transmission.
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