A packet carried on an optical network is routed by carrying out a logic operation on an address word carried in a packet header, and a predetermined discriminator word. A binary routing decision is made in accordance with the product of the logic operation. The operation may be a bit-wise Boolean AND operation. An additional logic operation may be carried out with an additional discriminator word to determine whether the packet is destined for a remoter region of the network. In this case the packet may be steered directly to the remote region.

Optical telecommunications network

Several approaches to photonic fast packet switching systems are presented. The wavelength-, time-, code-, and space-division approaches, including free-space photonic fast packet switching, are discussed. These approaches to photonic fast packet switching systems show that the research in this area is still in its infancy. Among various solutions, those based on a wavelength-division transport network and an electronic controller are most mature. >

Photonic fast packet switching

http://www.hit.bme.hu/~jakab/edu/litr/wdm/opt-net-Jaj.pdf

Optical networks-the electro-optic reality

Regular two-connected multihop transparent optical networks using ultrahigh bit-rate single-wavelength on/off keying are addressed. A novel solution for packet and node architecture is introduced to take full advantage of the recently demonstrated optical samplers and of the electronic processing capability. Channel transmission error arguments show how the size of these nonregenerative networks employing deflection routing is limited for a given optical bit rate. These limits are quantified for the Manhattan street network and ShuffleNet employing solitons. An upper bound on network performance in terms of maximum achievable bit rate and throughput for a given packet error rate is evaluated by taking into account the soliton self-frequency shift due to Raman scattering, the jitter due to amplified spontaneous emission noise, the short-range interaction, and their interplay. Results show that if the packet error rate is to be bounded below 10/sup -6/, the node-to-node fiber span cannot exceed a few kilometers for network sizes greater than 64 nodes when the optical bit rate is as high as 100 Gb/s. >

/pdf/design-and-channel-constraint-analysis-of-ultrafast-multihop-1f9j9u73le.pdf

Design and channel constraint analysis of ultrafast multihop all-optical networks with deflection routing employing solitons

A compact multiplexing scheme for high-capacity gigabit-per-second time-division multiple-access (TDMA) networks is described. The optical data pulses from an array of surface-emitting lasers are individually modulated, time compressed, relatively time delayed, and bit interleaved to form a single high-speed data stream, all in one simple process requiring a minimum of hardware. >

A directly modulated pulse-compressed and time-multiplexed optical source for high-speed multiple-access networks

Electronic routing control of photonic switches is considered. The types of network architectures and routing strategies that the authors think are best-suited to optical processing are proposed, and a generic optical routing processor is described. Address-encoding schemes for optically controlling a photonic switching node are presented. The results of several experiments that have demonstrated optical control of a photonic switching node are reported. Potential applications of these photonic switching architectures are described. >

P.A. Perrier

Papers

Optically-processed routing for fast packet switching