Title :
All optical digital correlators for multiple access networks
Author :
Riddell, D. ; Shabeer, M. ; Andonovic, I. ; Culshaw, B. ; Marshall, I.
Author_Institution :
Dept. of Electron. & Electr. Eng., Strathclyde Univ., Glasgow, UK
Abstract :
An all-optical guided-wave approach in which a network is implemented and programmed to operate upon a data stream in the link and will determine a match or mismatch condition is described. The basic building block consists of two conventional guided-wave directional couplers interconnected with a predetermined time delay T, corresponding to the delay between incoming optical bits. Each coupler is programmed in the following manner: for a coupler to represent 1 the coupling ratio is set, for example, to 5% and for a binary 0 the coupler is set to 0% coupling. The coupled channels are interconnected by a length of waveguide, the time delay of which is smaller than T, and are fed into a thresholding device which acts as a limiter. The techniques employed are incoherent, obviating the severe operational problems inherent in coherent approaches.<>
Keywords :
directional couplers; integrated optics; multi-access systems; optical correlation; optical couplers; optical links; telecommunication networks; all-optical guided-wave approach; coupled channels; data stream; directional couplers; incoherent techniques; integrated optics; limiter; link; match condition; mismatch condition; multiple access networks; optical digital correlators; thresholding device; time delay; All-optical networks; Bit rate; Correlators; Couplings; Delay effects; Optical fiber networks; Optical network units; Optical receivers; Optical signal processing; Propagation delay;
Conference_Titel :
Optical Multiple Access Networks, 1990. Conference Digest. LEOS Summer Topical on
Conference_Location :
Monterey, CA, USA
DOI :
10.1109/OMAN.1990.205432
