Katsuya Ikezawa

Demonstration of 10 Gbit Ethernet/Optical-Packet Converter for IP Over Optical Packet Switching Network

We developed novel network interfaces, for example 10 Gbit Ethernet to 80 Gbit/s optical-packet (10 GbitE-80 GbitOP) or 80 Gbit/s optical-packet to 10 Gbit Ethernet (80 GbitOP-10 GbitE) converters (collectively called as 10 GbitE/80 GbitOP converters), to connect optical packet switching (OPS) networks with IP technology-based networks. By using newly developed arrayed burst-mode optical packet transmitters/receivers together, the 10 GbitE-80 GbitOP converter at the ingress edge node of the OPS network encapsulates an IP packet into an 80(8lambda&times;10)&nbsp;Gbit/s dense wavelength division multiplexing (DWDM)-based optical packets and generates an optical label based on a lookup table and the destination addresses of the IP packet. The 80 GbitOP-10 GbitE converter at the egress edge node decapsulates the IP packet from the optical packet and generates a 10 GbitE frame accommodating the IP packet according to a lookup table. By using these network interface devices and OPS system based on multiple optical label processing, we achieved, for the first time, 74-km single-mode fiber transmission, switching, and buffering of 80(8lambda&times;10)&nbsp;Gbit/s DWDM-based optical packets encapsulating almost 10 Gbit/s IP packets with error-free operation (IP packet loss rate < 10-6).

All-optical multiple-label-processing based optical packet switch prototype and novel 10 gb ethernet / 80 (8λ × 10) gbps-wide colored optical packet converter with 8- channel array burst-mode packet transceiver

We demonstrate IP-packet/10-Gbit-Ethernet transporting by novel 80-Gbit/s/port optical packet switch prototype with IP/OP converters, packet-transceiver of instantaneous- locking (≪1 ns), and multiple-label-processor of ultra-fast processing (/spl Gt;100 ps) to achieve 7.2- Gbps IP-packet throughput with low packet-loss-rate (<10-6).

First Field Trial of OLS Network Testbed with All-Optical Contention Resolution of Asynchronous, Variable-Length Optical Packets

We demonstrate field trial of asynchronous, variable-length packet contention resolution at data-rate of 10-Gb/s in an OLS network testbed built with in-ground field fiber. Both the lab-test and the field trial results indicate error-free operation.

Demonstration of Modulation Format Free and Bit Rate Free Characteristics of 2 ns Optical Switch for Optical Routers

We demonstrated modulation format free and bit rate free characteristics of our high-speed optical switches with 43 Gbps DQPSK, DPSK and 160 Gbps RZ signals. BERs versus OSNR were achieved without penalty for the DQPSK and DPSK.

Novel Layer-3 IP Packet Switching between 10 Gbps Ethernet and 80 Gbps Optical Packet-Switched Networks

We develop novel layer-3 (L3) Internet protocol (IP) packet switches to connect 80 Gbps WDM-based optical packet switching (OPS) networks with 10 Gbps Ethernet (10GbE). A L3 switch, which is the ingress edge node of the OPS network, generates an optical label according to a look-up table and the destination address of an IP packet, and then encapsulates the almost 10 Gbps IP packet into an 80 Gbps (8-wavelength x 10 Gbps) optical packet Another type of L3 switch, which is the egress edge node of the OPS network, decapsulates the IP packet from the optical packet and generates a lOGbE frame accommodating the IP packet according to a look-up table. We achieve the transmission of 7.2-Gbps IP packets throughput with a packet loss rate under 10-6 and demonstrate smooth UDP/IP-based 3D high-definition television (HDTV) video-streaming via the L3 switches and 80 Gbps WDM-based OPS system.

10G bps burst-mode clock recovery with synchronization time of 50ps

We developed 10 Gbps burst-mode clock recovery IC with synchronization time of 50 ps. Using the IC with PIN-TIA PDs, an optical packet receiver which requires no preamble is also developed.

Recent Development of High-Speed Optical Switches and Receivers for 40-Gbps Next-Generation Networks

40-Gb/s optical packet label recognition, switching, and buffering using an optoelectronic logic module and a waveguide matrix optical switch module are demonstrated. The switch can achieve a high ON/OFF extinction ratio of 25-26 dB and a first switching time of less than 2 ns.