Work

Continuous real-time optical homodyne detection

Year: 2025

Type: article

Abstract: Optical homodyne detection is a powerful method for measuring the statistical properties of light, including coherent, stochastic, and quantum properties of optical fields. However, the use of this method in applied research and industry to generate the feedback signal is hindered by the significant delay required for data analysis. In this work, we demonstrate a combination of software and hardware solutions that perform calculations of an array of light field quadrature amplitudes, i.e., the primary and most labor-intensive part of data processing with low latency. This enables us to conduct real-time second-order correlation measurements, with the complete signal accumulation and processing cycle happening over 1000 times per second. Moreover, the time allocated for signal accumulation and processing is almost evenly distributed. The real-time measurements demonstrated pave the way for automated feedback loops that meet the requirements of research and industry.

Source: Optics Express

DOI: 10.1364/oe.554370

Authors: Artur V. Trifonov, Felix Godejohann, Oleg N. Yakovlev, Ilya A. Akimov, Manfred Bayer, Marc Aßmann

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: Deutsche Forschungsgemeinschaft

Award: TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen