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This paper has investigated the enhanced fault-identification method based on the difference of intrinsic properties within an optical fiber. We have verified a fault-identification method using the wavelength dependency of non-reflective events through the experiment.
We successfully demonstrated real-time 16 quadrature amplitude modulation (QAM) encoded 11.52 Gb/s optical orthogonal frequency division multiplexing (OFDM) transceiver and experimentally investigated its optical transmission performances for OFDMA-PON systems. Considering practical deployment of OFDMA-PON, we decided to design and implement the 128 fast Fourier transform (FFT) in our OFDM baseband...
This paper describes the necessity of the optical transceivers for the mobile fronthaul based on wavelength division multiplexing (WDM). Among various candidates, we have proposed an external cavity laser (ECL) based on inexpensive thin film filter. Transmission over single mode fiber of 20 km is examined under direct modulation of common public radio interface (CPRI) line rate option 3.
We proposed a simple method to initialize the wavelength of tunable laser in WDM-PON employing wavelength recognition using power difference method and accomplished plug & play function. We confirmed the feasibility of our proposed method.
This paper proposes a hybrid passive optical network (PON) system based on a dense wavelength division multiplexing-PON (DWDM-PON) and reach extender (RE) for increasing the optical link budget and link capacity in an existing gigabit PON (GPON) system. A DWDM-PON is applied to the feeder fiber and is interfaced with the RE. The RE provides a wavelength conversion between the DWDM-PON and GPON through...
APC receptacle type cooled RSOA-TOSA with low return loss and high coupling efficiency was successfully developed for field-deployed WDM-PON application.
We describe the first RSOA-based WDM/TDM hybrid PON system to enter commercial service. The system, consisting of a 16 times 1.25 Gb/s colorless Gigabit WDM-PON and a legacy TDM-PON with optical-electrical-optical converters, provides the triple-play service using fiber-to-the-home and fiber-to-the-node in a new residential area in Korea.
A reconfigurable-optical add/drop multiplexer (ROADM) provides network flexibility and remote provisioning of end-to-end connection via ASON/GMPLS control, which opens the possibility of dynamic construction of multicast trees in optical layer. In this paper, we discuss multicast capable ROADM based on wavelength-selective switch (WSS) and review its experimental results of feasibility demonstration.
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