Title :
Pattern edge extraction using parallel-connected AlGaAs-GaAs pn-pn optical switches
Author :
Hara, Kunihiko ; Kojima, Keisuke ; Mitsunaga, Kazumasa ; Kyuma, Kazuo
Author_Institution :
Mitsubishi Electr. Corp., Hyogo, Japan
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.<>
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; optical information processing; optical switches; semiconductor junction lasers; semiconductor switches; contrast ratio; edge elements; intermediate elements; laser diodes; optical input patterns; optical output pattern; optical parallel image processing; parallel-connected AlGaAs-GaAs pn-pn optical switches; pattern edge extraction; thresholding characteristics; Diode lasers; Electrical resistance measurement; Image processing; Optical arrays; Optical fiber networks; Optical signal processing; Optical switches; Resistors; Surface impedance; Voltage;
Journal_Title :
Photonics Technology Letters, IEEE
