Pattern edge extraction using parallel-connected AlGaAs-GaAs pn-pnoptical switches |
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| Authors: | Hara K Kojima K Mitsunaga K Kyuma K |
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| Affiliation: | Mitsubishi Electr. Corp., Hyogo; |
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| Abstract: | Edge extraction from optical input patterns using parallel-connected AlGaAs-GaAs pn-pn optical switches is discussed. For a binary optical input pattern, an optical output pattern with emphasis on edge elements is obtained. The contrast ratio of the output between the edge and intermediate elements is 1.3:1. Thresholding characteristics of laser diodes are effective in enhancing the contrast ratio up to 5.2:1 |
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