Publications by authors named "Kyeong-Hwan Doo"

For the accommodation of mobile, business, and residential service in the same optical distribution network, we experimentally demonstrate 50 Gb/s (25 Gb/s × 2 wavelengths) wireless and wired service converged optical access network with 64-way power split over 20 km of single mode fiber in 1300 nm band. Applying simple Reed-Solomon based forward-error-correction and a cost-effective avalanche photodiode receiver without using an optical amplifier realize the 64-way power split. Accommodating dynamic bandwidth allocation and open interface control with OpenDaylight (ODL) controller via network configuration protocol (NETCONF) interface are demonstrated.

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We demonstrate a real-time 25-Gb/s PON prototype with ethernet-PON MAC/PHY, O-band transmitter, and cost-effective APD receivers. With applying parasitic inductance and capacitance reduction, the frequency response of 25-Gb/s APD ROSA with TO46-pacakge is improved to support high receiver sensitivity around -25 dBm at the BER of 10. The 30 dB power budget of 25 Gb/s downstream is achieved at the BER of 10.

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In a passive optical network (PON), discovery is a process that detects and registers newly connected optical network units (ONUs). A long-reach PON requires a longer discovery window, e.g.

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