Polarimetric sensor for the optical detection of a magnetic field and polarimetric sensor for the optical detection of an electric current

US6512357B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Thomas Bosselmann · Erlangen, DE
• Stephan Mohr · Jena, DE
• Michael Willsch · Jena, DE

Key dates

• Filing date: Jan 29, 2001
• Grant date: Jan 28, 2003
• Expiry date: Jan 29, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/0322
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A polarimetric sensor includes a sensor unit constructed as a permanently assembled unit having a polarizer, a sensor element and an analyzer. An input optical waveguide and an output optical waveguide with a core diameter of at least 100 &mgr;m are provided. A first light signal emerging from the input optical waveguide passes directly through the sensor unit and enters the output optical waveguide as a second light signal. An optical path of the first light signal through the sensor element is no longer than 50 times the core diameter of the output optical waveguide. No separate focussing or collimation optics are provided.