Coupling element for coupling light into and out of an optical fiber

US4540237A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventor

• Gerhard Winzer · Munich, DE

Key dates

• Filing date: Jan 29, 1985
• Grant date: Sep 10, 1985
• Expiry date: Jan 29, 2005

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/2817
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A coupling element is composed of a thick core fiber having an end formed by a first and second end surface with the first end surface extending substantially perpendicular to the axis of the fiber and the second end surface, which has a highly reflective mirror layer being inclined to the first end surface and to the axis. A second fiber, which is thinner than the first fiber, is coupled by a butt-joint to the first end surface and a third fiber which is also a thick core fiber branches off obliquely from the side of the first fiber adjacent the end.