Method and arrangement for carrying out time-domain measurements

US8546762B1 · kind B1 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Helmut Roehle · Berlin, DE
• Bernd Sartorius · Berlin, DE

Key dates

• Filing date: Jun 29, 2012
• Grant date: Oct 1, 2013
• Expiry date: Jun 29, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J3/2889
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Time-domain measurements are carried out using arrangements and methods. A transmitter generates electro-magnetic pulses upon receipt of pulses of an optical pulse source. A coherent detector detects the electro-magnetic pulses or an evoked electro-magnetic signal. A delay line periodically changes the optical path length between the optical pulse source and the coherent detector and/or the electro-magnetic transmitter by periodically moving an optical element of the delay line. A position sensor determines the position of the optical element and smoothes the data generated by the position sensor. The coherent detector detects the electro-magnetic signal evoked by the electro-magnetic pulses. Pulses of the optical pulse source trigger the coherent detector. The time-dependency of the electro-magnetic pulses and/or of the electro-magnetic signal evoked by the electro-magnetic pulses are determined using signals of the coherent detector upon receipt of the electro-magnetic pulses and/or of the electro-magnetic signal and the smoothed position sensor data.