Optical coupling arrangement

US5943459A · kind A · utility

Assignee

• Alcatel N.V. · NL

Inventors

• Olaf Hildebrand · Stuttgart, DE
• Walter Hoffmann · Bischofswerda, DE
• Hans Mayer · Frankfurt am Main, DE
• Werner Rehm · Heidelberg, DE
• Klaus Wunstel · Schwieberdingen, DE

Key dates

• Filing date: Sep 18, 1995
• Grant date: Aug 24, 1999
• Expiry date: Sep 18, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2006/12147
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical duplexer, configured as a directional coupler, is integrated into an optical coupling arrangement with a fiber optic pigtail, constructed in planar-optical hybrid technology on a substrate (1). To reduce the required surface area and decrease optical cross talk, the branch of the directional coupler (waveguide 6, branch 7) is sharply bent. The bend is equipped with a reflecting mirror (11) integrated opposite the inner edge (10) of the bend. Furthermore, the waveguiding end of the bent branch (7) is equipped with a cylindrical lens. A laser diode (8) is located before this, and a photodiode (5) is located before the angled end of the straight-line integrated waveguide (2).