Method and system for characterizing an optical device

US8630551B2 · kind B2 · utility

Assignee

• U2T PHOTONICS AG · DE

Inventors

• Michael Margraf · Berlin, DE
• Christoph Leonhardt · Berlin, DE
• Andreas Matiss · Berlin, DE

Key dates

• Filing date: Jul 12, 2011
• Grant date: Jan 14, 2014
• Expiry date: Apr 5, 2032

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B10/60
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

An embodiment of the invention relates to a system comprising an optical device (10) and an evaluation device (20) for characterizing the optical device. The optical device comprising a 90° optical hybrid unit (30) having a first and second optical input (30E1, 30E2) and at least two optical outputs (30A1-30A4) wherein optical output signals (So1-So4) leaving the optical outputs have optical phase differences between each other of 90° or multiple thereof; a first photodetector (P1) connected to a first optical output (30A1) and a second photodetector (P2) connected to a second optical output (30A2), wherein the first optical output emits a first optical output signal (So1) and the second optical output emits a second optical output signal (So2), said second optical output signal having an optical phase difference of 180° relative to the first optical output signal; and a first transimpedance amplifier (Tr1) connected to the first and second photodetectors (P1, P2). The evaluation device (20) is characterized by a signal source (110) configured to generate a first and second intensity-modulated optical input signal (Sin1, Sin2); an optical phase shifter (120) adapted to phase-shift …