Bonn 2025 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 30: Quantum Sensing I (joint session Q/QI)

Q 30.5: Talk

Wednesday, March 12, 2025, 12:00–12:15, HS V

Ultra-stable miniaturized optical systems for compactatom-based quantum sensors — •Conrad Zimmermann, Marc Christ, Sascha Neinert, and Markus Krutzik — Ferdinand-Braun-Institut (FBH), Berlin, Germany

The transition of atom-based quantum sensors from laboratory experiments towards compact field-usable devices demands for specialized miniaturization and integration technologies. On that path we develop and qualify a versatile technology toolbox enabeling robust and ultra-stable miniaturized optical systems to trap, probe and manipulate atomic ensembles. We set up a micro-integrated optical dipole trap system with a system volume of about 25 ml. It creates two high-power laser beams which precisely overlap in their focal points (ω₀ = 32 µm) at an angle of 45^∘. After two years of operation with up to 2.5 W of optical power and no signs of degradation, we share measurements demonstrating the mechanical stability and the capabilities and potentials of used technologies [1].
In addition, we utilize additive manufacturing of ceramics [2] and metals to realize functionalized components such as micro-optical benches, mounts and vacuum systems. We also report on our efforts regarding ultra-high vacuum (UHV) compatibility of components and bonds using our dedicated outgassing qualification system.

Keywords: quantum sensing; micro-integration; additive manufacturing; miniaturization