Transmission and reception module for a bidirectional optical communication and signal transmission

US5552918A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Joachim Krug · Neutraubling, DE
• Hans-Ludwig Althaus · Lappersdorf, DE
• Alfred Hartl · Nittendorf, DE
• Gerhard Kuhn · Altötting, DE

Key dates

• Filing date: Oct 6, 1995
• Grant date: Sep 3, 1996
• Expiry date: Oct 6, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/4246
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A transmission and reception module for a bidirectional optical communication and signal transmission includes a light transmitter having a first lens coupling optical element, and a light receiver. A fiber connection has a second lens coupling optical element for a common optical waveguide. A beam splitter is disposed in a free beam path. A common housing surrounds the foregoing. The light transmitter, the beam splitter and the fiber connection as well as the light receiver which is orthogonal thereto, are disposed axially symmetrically. An optical axis of the first lens coupling optical element is axially offset from an optical axis of the light transmitter, an optical axis of the second lens coupling optical element is axially offset from the optical axis of the fiber connection, the end surface of the fiber connection, given optimal coupling-in of light, has an angle of inclination relative to its optical axis, and the beam splitter is inclined relative to an axis of symmetry of the configuration, such that backreflected radiation strikes neither a radiation-active part of the light transmitter nor a radiation-sensitive part of the light receiver.