Seiji Kozaki

Resilience and service protection for ethernet passive optical networks in SIEPON

IEEE Ethernet passive optical networks support the SIEPON-defined data link protection for mission-critical services in a flexible, costeffective, and reliable manner, addressing the need for guaranteed link availability for mobile backhaul applications, business customers, institutions, data centers, campuses, and so on, serving hundreds or even thousands of subscribers. In this article, we look at the motivation behind the EPON protection schemes from a network operator perspective, as well as ways of delivering increased data service availability while minimizing the impact on the network cost and complexity. We also examine mechanisms used in EPON for link fault detection, spanning from physical through logical to link layers.

The demonstration of symmetric 10G-EPON system for coexistence with 1G-EPON

The 10 Gbps-PON system with 10 G/1G coexistence capability is one of the most promised systems for next generation optical access networks. We successfully developed 10 G-EPON system for coexistence with existing 1 G-EPON ONU with 8.46 Gbps upstream throughput.

Super-splits 10G-EPON system: 256 ONU passive splits with 240 ns dual-rate burst-mode 3R synctime and bi-directionally extended 35.9 dB loss budgets

This first super-splits 10G-EPON demonstration achieved the largest loss budget of 35.9 dB and a fast dual-rate synctime of 240 ns supporting 256 ONU splits with 8.0 Gb/s upstream throughput, highlighting novel self-switching AGC based XFP, 82.5 GS/s CDR and ONU SFP+.

Single platform 10G-EPON 10.3-Gbps/1.25-Gbps dual-rate CDR with fast burst-mode lock time employing 82.5 GS/s sampling IC and bit-rate adaptive decision logic circuit

We demonstrate a novel 10G-EPON dual-rate CDR using single 82.5 GS/s sampling IC and dual-rate decision logic that achieves rapid burst-mode lock time of 37 ns at 10.3 Gbps in BER=10⁻³ and of 64 ns at 1.25 Gbps in BER=10⁻¹² via dynamically phase and bit-rate varied optical packets.

A study of clock and data recovery with composite structure of oversampling and gated oscillator for 10Gbit/s subscriber network

A composite clock and data recovery circuit based on oversampling and a gated oscillator is proposed. The reduction in the number of multi-phase clocks to be integrated in current silicon technology is discussed. The tolerance to pulse-width variation in a data packet is predicted numerically for an application to 10Gbit/s-based subscriber networks.

1.25/10.3Gbps dual rate algorithm for 10G-EPON burst-mode CDR

We present new dual rate algorithm for a burst-mode CDR and successfully achieved rapid burst-mode data recovery of less than 16 ns at 1.25 Gbps and of less than 6.4 ns at 10.3 Gbps in the same platform.