U2t Photonics Ag

Michael Margraf

Andreas Matiss

Christoph Clemens Leonhardt

Christoph C Leonhardt

An embodiment of the invention relates to a system comprising an optical device () and an evaluation device () for characterizing the optical device. The optical device comprising a 90&#xb0; optical hybrid unit () having a first and second optical input (EE) and at least two optical outputs (A-A) wherein optical output signals (So-So) leaving the optical outputs have optical phase differences between each other of 90&#xb0; or multiple thereof; a first photodetector (P) connected to a first optical output (A) and a second photodetector (P) connected to a second optical output (A), wherein the first optical output emits a first optical output signal (So) and the second optical output emits a second optical output signal (So), said second optical output signal having an optical phase difference of 180&#xb0; relative to the first optical output signal; and a first transimpedance amplifier (Tr) connected to the first and second photodetectors (P, P). The evaluation device () is characterized by a signal source () configured to generate a first and second intensity-modulated optical input signal (Sin, Sin); an optical phase shifter () adapted to phase-shift the optical phase of the second intensity-modulated optical input signal relative to the optical phase of the first intensity-modulated optical input signal; a measurement unit () adapted to measure the electrical output signal of the first transimpedance amplifier (Tr); and a control unit () adapted to control the optical phase shifter.

Growing community of inventors

Berlin, Germany

Michael Margraf