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Q: Fachverband Quantenoptik und Photonik

Q 48: Poster – Quantum Optics, Technologies, and Optomechanics

Q 48.58: Poster

Wednesday, March 12, 2025, 17:00–19:00, Tent

Advanced fiber-optic interfaces – fiber cavities and beyond — •Florian Giefer, Benedikt Beck, Daniel Stachanow, Lukas Tenbrake, Sebastian Hofferberth, and Hannes Pfeifer — Institute of Applied Physics, University of Bonn, Germany

Applications for fiber Fabry-Perot cavities (FFPCs) reach from the miniaturization of existing cavity QED systems to novel use-cases in optomechanics, sensing, laser technology and many more. In this contribution we present an overview over our current research on fiber interfaces and FFPCs in the Bonn Fiber Lab.

We showcase our progress in the development of fiber cavity interfaced micro-mechanical resonators that are fabricated via 3D direct laser writing, including Q-factor optimization techniques like dissipation dilution and glassy structures with higher intrinsic Q. We present a scannable vacuum-integrated fiber cavity setup for probing high quality-factor mechanical resonators for experiments with multi-resonator structures.

We further investigate the behavior of optically pumped dye molecules in fiber cavities for the development of a miniaturized, directly fiber coupled and widely tunable dye laser system.

For interfacing cold atoms we present our development of a miniaturized fiber to fiber setup with a free space slot in between. The needed fiber collimation lens system is fabricated with a 3D direct laser writing system (Nanoscribe) and will be used in an experiment to interface Rydberg Atoms.

Keywords: Fiber Cavity; Direct Laser Writing; Dissipation Dilution; Fabry-Perot; Nanoscribe