Module for bidirectional optical communication

Abstract

Abstract PURPOSE:To decrease the leakage of light from a light emitting element to a photodetecting element by consisting in bringing a glass block coated with a half mirror, etc. into contact with the diagonally polished surface of an optical fiber of which the top end is incorporated in a glass tube and of which the end face is diagonally polished together with the end face of the tube with respect to the central axis. CONSTITUTION:The optical fiber 20 is incoporated into the glass the tube 21 at the central axis thereof and the top end thereof is polished diagonally at 45 deg.. The 1st lens 16 and the glass block 18 coated witht the half mirror 19 are disposed between the light emitting element 15 and the fiber 20 and the light from the fiber 20 reflected by the mirror 19 is imaged through the 2nd lens 17 to the photodetecting element 22. Since the end face of the fiber 20 is adhered to the mirror 19, the optical path between the element 15 and the element 22 is short and since the mirror 19 and the fiber 20 are united, the optical axial alignment of the element 15 and element 22 as well as the fiber 20 is easy.

Inventors

• 👤 Tsutomu Aoyama
• 👤 勉 青山

Bibliographic Details