Bonn 2025 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 49: Poster – Photonics, Lasers, and Applications
Q 49.2: Poster
Mittwoch, 12. März 2025, 17:00–19:00, Tent
Towards enhanced homodyne detection with a squeezed local oscillator — •Aishi Barua1,2, Lorenzo M. Procopio1,2, Laura Ares1,2, Jan Sperling1,2, and Tim J. Bartley1,2 — 1Institute for Photonic Quantum Systems (PhoQS), Paderborn University, Warburger Str. 100, Paderborn, Germany — 2Department of Physics, Paderborn University, Warburger Str. 100, Paderborn, Germany
Homodyne detection, a well-known technique in the field of quantum optics, serves as a powerful measurement method for continuous-variable quantum states, by typically utilizing a strong coherent local oscillator to establish a stable phase reference. By squeezing either the local oscillator or the probe signal field, quantum noise can be reduced below the standard quantum limit, thereby enhancing the sensitivity of homodyne detection We present a novel approach aimed to enhance homodyne detection by implementing bright squeezed light as the local oscillator, a concept that remains unexplored. For measurement we aim to use photon-number-resolving detectors instead of linear photodiodes for intensity correlations at the single-photon level. We discuss our progress, future goals and feasibility of this approach.
Keywords: Homodyne detection; Squeeze light; KTP; SNSPD; SPDC