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Q: Fachverband Quantenoptik und Photonik

Q 59: Poster IV

Q 59.71: Poster

Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof

The squeeze laser — •Axel Schönbeck, Jan Südbeck, Jascha Zander, Dieter Berz-Vöge, Pascal Gewecke, Malte Hagemann und Roman Schnabel — Institut für Laserphysik der Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg

An increasing number of laser-based measurements in metrology are performed at the quantum-noise limit. Squeezed light helps to overcome this limit. For example, as of 2019, all gravitational-wave observatories (GWOs) worldwide use squeezed vacuum states of light.

"Squeeze laser" is a well-motivated name for what is often referred to as a "squeezed light source". Squeezed light is generated in a laser resonator by parametric down-conversion. The laser's output modes have a large coherence time and are in a near-perfect TEM00 mode. We are launching a spin-off from UHH that will offer these squeeze lasers. Which applications benefit from them?

The squeeze laser is a valuable tool for research laboratories. It is required for one-sided device-independent quantum key distribution (QKD) [Nature Commun. 6, 8795 (2015)] and enables a new technique for absolute calibration of photo sensors [Phys. Rev. Lett. 117, 110801 (2016)]. Measurement-based optical quantum computing requires squeezed states [Science 366, 369-372 (2019)]. The squeeze laser can improve industrial laser Doppler vibrometers in environments with low optical losses [Review of Scientific Instruments 87, 102503 (2016)] [Quantum Sci. Technol. 8, 01LT01 (2022)]. It is also beneficial in the detection and imaging of biological cells and macromolecules [Nature Photon. 7, 229-233 (2013)].