Optical AND element useful for optical label process, comprises semiconductor laser having saturable absorption regions, electrodes of the saturable absorption regions being separated from each other, and light inputting section

摘要

An optical AND element comprises a semiconductor laser (1) having saturable absorption regions (3) on a first optical waveguide (2), electrodes of the saturable absorption regions being separated from each other; and light inputting section for inputting light into the respective saturable absorption regions.