Muhsen Aljada

Date of Award


Document Type

Thesis - ECU Access Only


Edith Cowan University

Degree Name

Doctor of Philosophy


School of Engineering and Mathematics


Faculty of Computing, Health and Science


Optical correlators arc attractive elements for packet-switched optical networks because they enable the headers of high-speed optical packets to be processed and recognised "on-the-fly", thus, switching the packets to different destinations without the need for optical-to-electrical and electrical-to-optical conversions. In the first part of the thesis, three novel all-optical header recognition structures based on time-domain optical correlation arc proposed and experimentally demonstrated. The novel optical correlator structures for header recognition, are based on the use of Opto-VLSI processors, fibre Bragg gratings, and arrayed waveguide gratings, respectively, and are demonstrated at IOGb/s by generating auto-correlation functions of high peaks whenever the optical header bit pattern matches a predetermined pattern in the lookup table, while for other bit patterns, only low intensity (below a threshold level) cross-correlation functions are produced. As a result, these structures eliminate the bottleneck that exists in the conventional ortical packet switching networks, thus greatly enhancing the performance of such networks.