Tunable WDM holographic devices: application in reconfigurable access and metro networks

Abstract

In this paper, a design of a generic multipurpose device is described. It can operate, in its basic structure, as a tunable wavelength filter, wavelength multiplexer or λ router; by using a more complex structure, the device works as OADM (optical add drop multiplexer) or/and OS (optical switch). Some applications of the holographic WDM multifunction device in metro networks are described, such as the utilization of an OADM/switch matrix in optical path protection/reconfiguration between nodes. Other applications in access networks are possible, like, in same specific cases, the use as tuneable holographic filter in a FTTO application, at the business ONT (BONT), to select the assigned optical wavelength according to the services provided to the customer.