ELEMENTARY PHOTONIC SWITCHING MODULES IN 3 DIVISIONS

In three-divisional photonic switching networks, data is interchanged among channels that are formed in space, time, and wavelength, This pa per presents several techniques for designing the architectures of sma ll photonic switching modules that switch in three divisions, In one t echnique, Marcus' classical transformation from a space-only Clos Netw ork to a Time-Space-Time architecture is generalized to the wavelength division and extended to three divisions, In another technique, Hunte r's recent space-time transformation is also generalized and extended to three divisions, It is illustrated on several classical network arc hitectures, including the most elementary case of a three-division pho tonic switching module based on the Benes architecture: an eight-by-ei ght network in which each side has two fibers and each fiber has two w avelengths and two timeslots.