Optical coupler and amplifier

US5412746A · kind A · utility

Assignee

• Alcatel N.V. · NL

Inventors

• Rolf Rossberg · Schwieberdingen, DE
• Rainer Fritschi · Heimenkirch, DE
• Jurgen Otterbach · Stuttgart, DE
• Rolf Heidemann · Zöblitz, DE

Key dates

• Filing date: Mar 22, 1994
• Grant date: May 2, 1995
• Expiry date: Mar 22, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/4287
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A coupler (1) made of optical fibers is provided with a device for detecting the light that is carried in one of the fibers at the coupler output in operation. For that purpose, the coupler (1) embedded in an enclosure (2) has at the coupler output a lens body (8) enclosing the optical fiber (pigtail 6) and a detector (9) aimed at the lens body (8). With the detector, during coupler operation, lost light dissipated via the primary coating of the optical fiber is received by the lens body (8 ) and carried by the detector (9) to an electrical evaluator.