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A novel optical buffer memory with a shift register function is proposed. 10 Gbit/s optical buffering has been successfully demonstrated using 980 nm VCSELs. We have also demonstrated polarization bistability and all-optical flip-flop operation in 1.55 mum VCSELs.
We investigated the system performance of variable slowlight buffers based on cascaded silica micro-resonator-rings. Continuous tunable buffering to wavelengths of choice is achieved, without losing any packets in an optical packet switching network.
This paper investigates path restoration in translucent optical networks. Regenerator information is carried by GMPLS protocols (RSVP-TE signaling and OSPF-TE routing protocols). Restoration performance is evaluated in terms of blocking probability and control plane load.
This paper presents an efficient multicast routing algorithm called DNMA. According to our simulation results, the proposed algorithm outperforms some existing well-known approaches for solving QoS of multicast routing problem in large scale networks.
Pair-control is essential to save processing time of the control software for both-way communication. We have developed the pair-controlled photonic switch matrixes, which save switching elements and control circuits, and greatly contribute to the economy of the photonic switching node.
We propose an all-optical carrier regeneration scheme for wavelength independent optical network units based on a Brillouin/Erbium fiber laser. It is experimentally evaluated through bidirectional transmission at 1.25 Gb/s.
The combination of linear pulse shaping, achieved using superstructured fibre Bragg gratings, and fibre-based nonlinear switching facilitates advanced all-optical processing of signals. Some applications include suppression of timing jitter, and demultiplexing based on frequency-shifting of OTDM signals.
This study presents an evaluation of heuristics that reconfigure a multi-layer network logical topology for efficiently accommodating variable traffic patterns. Numerical results show that reconfiguration is useful if the network is not heavily loaded.
We propose a new hierarchical optical cross-connect node architecture that utilizes 3D MEMS-based WSS and WBSS (Waveband Selective Switch). We evaluate the total number of MEMS mirrors necessary to implement the node, a key parameter in determining node reliability and cost. It is demonstrated that the proposed hierarchical architecture requires a lot less mirrors than conventional single-layer WSS...
We describe the design and results of several hybrid silicon devices that combine benefits of III-V semiconductors with silicon-based platforms. Presented work includes a silicon-on-insulator evanescent phase modulator and a recirculating buffer using silica waveguides.
We study the amplification of 40 Gb/s RZ signals (having 7 ps-long pulses) in a high gain (30 dB) semiconductor optical amplifier. We report an experimental comparison between straightforward amplification and amplification assisted by the use of both continuous wave (CW) and modulated holding beams.
This paper will present recently identified and demonstrated key technologies for ultra-high-speed serial communications. Certain key components such as stabilised highly non-linear fibre switches, periodically poled Lithium Niobate devices and semiconductor optical amplifiers will be described with demonstrations of 640 Gb/s transmission, clock recovery, demultiplexing, add/drop, wavelength conversion...
Queuing performance of finite single-wavelength FDL buffer is studied analytically in OPS networks. The evaluation approach can be applied on practical buffer system implementation.
We will review and discuss future prospects for optical packet switching and burst switching technologies. Component, system, and networking technologies, and their impacts in future networks will be discussed.
With the help of the two-wave competition (TWC) in saturated ultra-long semiconductor optical amplifiers (UL-SOAs) the extinction ratio (ER) of high-speed optical signals can be regenerated. We investigate the UL-SOAs' optimum operating range for the ER improvement. As a result, we present driving conditions for a stable regeneration scheme.
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