After introducing Fast Packet Switching (FPS) technique, the paper presents a near future scenario characterized by a relevant utilization of wideband services based on packetized information exchange, and analyzes a possible application of FPS technique to photonic switching. An electro-optical Fast Packet Switching node model is proposed and the main optical switching fabric requirements are defined, considering its insertion in the wide-band public telecommunication network.
The size of an optical switching network based on 2×2 optical switching elements, is limited by a series of factors: the relatively small phisical size of the substrate (no more than 100×75 mm for LiNbO3), the phisical size, loss and crosstalk of the switching element, the loss introduced by the fiber-substrate coupling and the large radii (more than 1 cm) imposed to the waveguide to keep bend loss around few hundredths of dB/degree.
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