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We reviews optical access technologies for 5G mobile communication networks such as mobile data compression, high-speed passive optical network (PON), and analog radio over fiber (RoF) technologies. Recent feasibility studies for future optical access network with optical mobile convergence are discussed.
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...
We have proposed protocol based WDM-PON power saving mechanism with cyclic sleep-mode ONU and OLT for Green access network. Power saving models show that the each home-gateway styled tunable ONU and OLT could reduce efficiently the power consumption around 70 % when the ratio of sleep-mode time and wakeup-mode time set to 0.1.
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.
We proposed a novel method to implement the coherent seeding source using optical feedback and experimentally demonstrated the feasibility of our seed light under various back reflection levels in a loop-back WDM-PON based on RSOA.
We proposed a burst mode bit discrimination circuit for dual rate reach extender and experimentally demonstrated the transmission performances of dual rate burst mode receiver in a WDM-TDM-Hybrid-PON based on 10G-EPON.
We have successfully demonstrated a loop-back WDM-PON with a 100 Gb/s (80 × 1.25 Gb/s) capacity using spectrally sliced ASE injected RSOA. To mitigate the RIN degradations, we proposed injection current adjustment, dispersion management and the use of receiver with optimized decision threshold level.
We demonstrate a low-cost shared seed light for WDM-PON OLTs. Sixteen WDM-PONs can share the centrally located pre-spectrum sliced seed light (PS-SL), which reused spectrum sliced backward ASE light. Bidirectional 1.25-Gb/s data services using R-SOA transmitters are demonstrated over 20 km.
We investigated the wavelength-dependent operating characteristics of RSOA with external injection for color-free operation over entire wavelength range of C-band or L-band, which can be widely applicable for RSOA-based WDM-PONs.
In the RSOA based remodulation WDM-PON link, the quality of the upstream performance largely depends on the downstream, such as downstream ER and the received optical power, which directly connected to the link power budget. By cascading RSOAs in the ONU, aforementioned link design constraints were alleviated; the link power budget can be increased by 10 dB when the downstream ER of 5 dB.
Colorless gigabit wavelength-division-multiplexing (WDM)/time-division-multiplexing (TDM) hybrid passive optical network (PON) using a remote protocol terminator is proposed and experimentally demonstrated. The system consists of reflective semiconductor optical amplifier-based WDM-PON and a legacy TDM-PON, combined with a simple and efficient remote node structure in order to provide high-speed fiber-to-the-home...
In a SML-seeded loop-back WDM-PON, the upstream BER plots show variation of power penalty by 2 dB, depending on the difference of seed and ripple peak wavelength, which is related to the RSOA transient chirp.
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.
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