3 research outputs found
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Research data for research paper: Precise positioning of an ion in an integrated Paul trap-cavity system using radio frequency signals
<div>The data provided is the data used in 11 of the figures in the research paper. Each sheet in the spreadsheet is labelled by the figure label they correspond to in the research paper.</div><div><br></div><div><b>Abstract from research paper:</b></div><div>We report a novel miniature Paul ion trap design with an integrated optical fibre cavity which can serve as a building block for a fibre-linked quantum network.</div><div>In such cavity quantum electrodynamic set-ups, the optimal coupling of the ions to the cavity mode is of vital importance and this is achieved by moving the ion relative to the cavity mode. The trap presented herein features an endcap-style design complemented with extra electrodes on which additional radiofrequency voltages are applied to fully control the pseudopotential minimum in three dimensions. This method lifts the need to use three-dimensional translation stages for moving the fibre cavity with respect to the ion and achieves high integrability, mechanical rigidity and scalability. </div><div>Not based on modifying the capacitive load of the trap, this method leads to precise control of the pseudopotential minimum allowing the ion to be moved with precisions limited only by the ion's position spread. We demonstrate this by coupling the ion to the fibre cavity and probing the cavity mode profile. </div
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Data set for publication 'Enhanced ion–cavity coupling through cavity cooling in the strong coupling regime'
Data set for the figures in the publication 'Enhanced ion–cavity coupling through cavity cooling in the strong coupling regime.Scientific Reports 10, 15693 (2020)'The data are the ones to produce the figures in the publication. Details can be found within the spreadsheet.Abstract:Incorporating optical cavities in ion traps is becoming increasingly important in the development of photonic quantum networks. However, the presence of the cavity can hamper efficient laser cooling of ions because of geometric constraints that the cavity imposes and an unfavourable Purcell effect that can modify the cooling dynamics substantially. On the other hand the coupling of the ion to the cavity can also be exploited to provide a mechanism to efficiently cool the ion. In this paper we demonstrate experimentally how cavity cooling can be implemented to improve the localisation of the ion and thus its coupling to the cavity. By using cavity cooling we obtain an enhanced ion–cavity coupling of 2π×(16.7±0.1) MHz, compared with 2π×(15.2±0.1) MHz when using only Doppler cooling.</div
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Dataset for 'Fibre cavities with integrated mode matching optics'
Data for paper published in Scientific Reports vol. 7, July 2017
Gulati, G.K., Takahashi, H., Podoliak, N. et al. Fiber cavities with integrated mode matching optics. Sci Rep 7, 5556 (2017). https://doi.org/10.1038/s41598-017-05729-8Â
Abstract
In fiber based Fabry-Pérot Cavities (FFPCs), limited spatial mode matching between the cavity mode and input/output modes has been the main hindrance for many applications. We have demonstrated a versatile mode matching method for FFPCs. Our novel design employs an assembly of a graded-index and large core multimode fiber directly spliced to a single mode fiber. This all-fiber assembly transforms the propagating mode of the single mode fiber to match with the mode of a FFPC. As a result, we have measured a mode matching of 90% for a cavity length of ~400 μm. This is a significant improvement compared to conventional FFPCs coupled with just a single mode fiber, especially at long cavity lengths. Adjusting the parameters of the assembly, the fundamental cavity mode can be matched with the mode of almost any single mode fiber, making this approach highly versatile and integrable.Â
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