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Without using a cyclic prefix, a DML-based 10-Gb/s OFDM at 2.5-GHz bandwidth transmission over 65-km SMF is demonstrated to be possible while maintaining the efficient throughput and short-latency time required for future long-reach access systems.
We proposed hybrid energy saving technique in which cooperates the operation frequency switching with active/sleep mode switching. Furthermore, we showed the effectiveness of our proposal by applying it to 10G-EPON system using circuit simulator.
This paper proposes an optical access system that enables voice communication services to continue when a power failure occurs. In particular, we propose applying a digital signal processing technique namely blind speech separation (BSS) to an optical multiple access system for demultiplexing randomly mixture signals received from an upstream user. We present a brief overview and the target of proposed...
This paper proposes a removable architecture for the wavelength-tunable DWDM-ONU in coexistence type WDM-PONs. The performance of a 50-GHz-spaced DWDM selector based on a simple angle-tuned multilayer thin-film filter is evaluated and the applicability is discussed.
We present WDM-PON technologies that enable us to achieve the plug-and-play function, which remotely and automatically controls all wavelengths over an optical distribution network. Key technologies are reviewed for constructing future flexible optical access networks.
A multi-wavelength stabilization technique is proposed based on a local minimum search. Experiments confirm that the estimated frequency stability is 3 GHz even for 100 downstream wavelengths with 50 GHz spacing.
We propose an error signal transfer method for remote frequency stabilization in DWDM-PON. The error signal is embedded in a downlink signal using a supervisory frame; the effectiveness of this method is experimentally confirmed.
We propose a multilevel transmission technique using stacked optical binary signals without any loss budget reduction when receiving multilevel signals. The principle is described and the validity of the technique is verified by numerical calculation.
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