W e study a class of all-optical networks using wavelength division multiplexing and wavelength routing in which a connection between a pair of nodes in the network is assigned a path and a wavelength o n that path. Moreover, o n the links of that path n o other connection can share the assigned wavelength. Using a generalized reduced load approximation scheme we calculate the blocking probabil...

We propose a new optical Local Area Network (LAN) that exhibits high total capacity and enables the connection of a great number of nodes. It is based on the combined advantages of coherent techniques and Frequency Division Multiplexing (FDM). The network topology is a passive star with a shared local oscillator that allows simple emission and detection schemes.

The electrical consumption of the core global networks is becoming preoccupant. To reduce it, one may bet on technological advances improving the energetic profile of individual components. However, large energy savings can potentially already be achieved, by reviewing the organization of the core networks. In this paper, we sketch directions which can be followed to improve the network organiz...

Quantum Key Distribution (QKD) is maturing quickly. However, the current approaches to its application in optical networks make it an expensive technology. QKD networks deployed to date are designed as a collection of point-to-point, dedicated QKD links where non-neighboring nodes communicate using the trusted repeater paradigm. We propose a novel optical network model in which QKD systems shar...