All-Optical Label Recognition Using Self-Routing Architecture of Mach-Zehnder Interferometer Optical Switches with Semiconductor Optical Amplifiers

Hitoshi HIURA  Nobuo GOTO  

IEICE TRANSACTIONS on Electronics   Vol.E90-C   No.8   pp.1619-1626
Publication Date: 2007/08/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.8.1619
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Optoelectronics
photonic packet switching,  self-routing,  all-optical switch,  address recognition,  semiconductor optical amplifier,  

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We propose a new label recognition system for photonic label switching using self-routing of labels. Binary-coded labels in on-off keying format are considered. The system consists of an all-optical demultiplexer (DeMUX) and an address recognition unit (ARU) consisting of tree-structured switches. The system uses self-routing propagation of an indication bit controlled with address bits. The indication bit is placed in advance of the address bits in the label. In DeMUX, all-optical switches in a configuration of Mach-Zehnder interferometer with semiconductor optical amplifiers (SOA-MZI) are controlled by the indication bit pulse to separate each of the label bits. The indication bit pulse is routed to the destination output port corresponding to the code of the address in ARU. It is shown that all the binary number codes can be recognized with this system. The operation principle is verified by numerical simulation using coupled-mode theory and a rate equation. Moreover, the switching crosstalk is also evaluated.