Photocoupler

Abstract

Abstract PURPOSE:To couple the light electric power of two semiconductors to the same one optical guide by allowing the polarized rays emitted by the two semiconductor lasers to enter an anisotropic crystal. CONSTITUTION:This utilizes the phenomenon in which the one optical path of the two orthogonally intersecting polarized rays entering an anisotropic crystal bends by suitably selecting the crystal axis of the anisotropic crystal, whereby the ray having the polarized ray perpendicular to the plane of the figure emitted from a semiconductor laser 11 is converted to parallel rays by a paralleling lens 41, and these parallel rays enter an anisotropic crystal 5 and the optical path thereof is bent by the anisotropic crystal 5. On the other hand, the ray having the polarized ray parallel to the plane of the figure emitted from a semiconductor laser 12 is converted to parallel rays by a paralleling lens 42 and these rays enter the anisotropic crystal 5. This ray advances rectilinear in the anisotropic crystal 5 and combines with the ray out from the semiconductor laser 11 at the output end thereof and these are focused by a focusing lens 6, and are coupled to an optical guide 3.

Inventors

• 👤 Takaichi Watanabe
• 👤 Kiyoshi Nosu
• 👤 Tetsuya Miki
• 👤 Kenji Okada
• 👤 Ikutaro Kobayashi
• 👤 Ryozo Kishimoto
• 👤 Takao Matsumoto

Bibliographic Details