Photo coupler

Abstract

Abstract PURPOSE:To form a photo coupler, in which both electroluminescence devices and a photo receiving element with thin-film structure are optically coupled easily with high efficiency and accuracy, and to improve productivity by forming both devices and elements to both surfaces of one tranaparent substrate respectively. CONSTITUTION:The light-emitting region of the electroluminescence devices 2 and the light-receiving region of the photo receiving element 3 are optically coupled through the transparent substrate 1 by each shaping the electroluminescence devices 2 and the photo receiving element 3 with thin-film structure to both surfaces of the transparent substrate 1, and optical coupling with high accuracy can easily be obtained without paying special attention to the coincidence, etc. of the optical paths of both devices and element in the optical coupling. Optical loss can be reduced extremely because each thin-film layer is extremely thin ones with the thickness of several microns from several thousand Angstrom and the light-emitting region and the light-receiving region are brought close through the transparent substrate 1 and a transparent thin-film group.

Inventors

• 👤 Masahiro Nonaka
• 👤 野中　正煕
• 👤 Shigemitsu Kiso
• 👤 木曽　茂盈
• 👤 Kensuke Funabiki
• 👤 船引　健介

Bibliographic Details