The tremendous growth of the high speed Internet and data traffic has created an enormousdemand for transmission bandwidth of dense wavelength division multiplexed (DWDM) opticalcommunication systems. The conventional optical amplifiers, such as the erbium doped fiber amplifier(EDFA) and Raman amplifier, are the vital components for DWDM system. Hybrid optical amplifiersuse where it is necessar...

The prime objective of the EPSRC-funded OPSnet project is the design and demonstration of an asynchronous DWDM optical packet switch (OPS) capable of directly carrying IP packets over DWDM-based core networks at transport rates in the order of 100 Gb/s and above. To achieve such an objective demands a highly flexible and innovative core switch architecture. The operation and performance of such...

OVPN over IP/GMPLS over DWDM technology with QoS assurances is considered as a promising approach for the next generation OVPN. In this paper, we suggest a multicast OLSP (Optical Label Switched Path) establishment mechanism for supporting high bandwidth multicast services in OVPN over IP/GMPLS over DWDM. For the establishment of the multicast OLSP, we propose a new multicast tree generation al...

λ2 OC-192 We are manufacturing widely tunable laser diodes based on an integrated single chip design. The sampled-grating distributed Bragg reflector (SG-DBR) laser is monolithically integrated with a semiconductor optical amplifier (SOA). The continuous wave (cw) output power of the fully packaged device is more than 20mW over the entire C-band with low noise figures and a high side-mode suppr...

Several steps in the development of Fibre optic Bragg grating for application in tuneable wavelength devices intended to DWDM are presented.

A new materials group to implement dense wavelength division multiplexing (DWDM) in Si photonics is proposed. A large thermo-optic (TO) coefficient of Si malfunctions multiplexer/demultiplexer (MUX/DEMUX) on a chip under thermal fluctuation, and thus DWDM implementation, has been one of the most challenging targets in Si photonics. The present study specifies an optical materials group for DWDM...

The evolution of broadband services will depend on the widespread deployment of optical networks. The deployment of such networks will, in turn, help drive increased demand for additional capacity. In this world, service providers will have a growing need to be able to flexibly adjust capacity to accommodate uncertain and growing demand. In this article, we present a cost model that highlights ...