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Q: Fachverband Quantenoptik und Photonik
Q 60: Quantum Information II
Q 60.1: Poster
Donnerstag, 17. März 2022, 16:30–18:30, P
Adiabatic coupling via tapered optical fibers — •Tim Turan1 and Tim Schröder1,2 — 1Institut für Physik, Humboldt-Universität zu Berlin, Berlin — 2Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Berlin
In a network where quantum information is shared via single photons, the coupling efficiency is crucial. One option to couple a quantum node, such as a vacancy center in diamond, to an optical fiber, is utilizing a tapered waveguide to tapered optical fiber interface. [1]
If the geometry is chosen right, the fundamental mode can be transferred adiabatically from the waveguide to the fiber with minimal losses. We use an established theory of this transfer [2] together with statistical methods to find optimal waveguide and fiber taper geometries for near-unity transmission. Furthermore, we provide methods to reliably fabricate these optimal fiber tapers.
[1] M. J. Burek et. al., Fiber-Coupled Diamond Quantum Nanophotonic Interface, Phys. Rev. Applied 8, 024026 (2017).
[2] J. D. Love et al., Tapered Single-Mode Fibers and Devices. Part 1: Adiabaticity Criteria, IEE Proc. J Optoelectron. UK 138, 343 (1991).