Title :
Optical digital matrix-vector processor using collinear guided-wave acoustooptic interaction
Author :
Goto, Nobuo ; Miyazaki, Yasumitsu
Author_Institution :
Dept. of Inf. & Comput. Sci., Toyohashi Univ. of Technol., Japan
Abstract :
An integrated-optic matrix-vector multiplier using collinear acoustooptic (AO) interaction is discussed. The processor performance in analog and digital representations is clarified. The collinear AO modules are integrated in parallel at a lateral separation of 200 μm, with an acoustic crosstalk of less than -25 dB for frequencies ⩾150 MHz. Optical crosstalk caused by the mode conversion along optical waveguide branches is also investigated. It is shown that a crosstalk due to SAW (surface acoustic wave) coupling between adjacent SAW waveguides can be suppressed under -25 dB by separating the AO modules to 200 μm for frequencies higher than 150 MHz
Keywords :
acoustic waveguides; acousto-optical devices; crosstalk; high-speed optical techniques; integrated optics; optical information processing; optical waveguides; parallel architectures; pipeline processing; surface acoustic wave devices; SAW coupling; SAW waveguides; acoustic crosstalk; analog representation; collinear guided-wave acoustooptic interaction; digital representations; integrated-optic matrix-vector multiplier; mode conversion; optical crosstalk; optical digital matrix-vector processor; processor performance; Delay; High speed optical techniques; Integrated optics; Optical crosstalk; Optical devices; Optical refraction; Optical variables control; Optical waveguides; Surface acoustic waves; Transmission line matrix methods;
Conference_Titel :
Ultrasonics Symposium, 1990. Proceedings., IEEE 1990
Conference_Location :
Honolulu, HI
DOI :
10.1109/ULTSYM.1990.171436
