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Optical Systems for Trapped Ion Fluorescence Collection

Gang Shu, University of Washington

(Session 5 : Friday from 5:00-7:00)

Abstract. Efficient and controllable ion fluorescence collection scheme is crucial for trapped ion qubit detection and single photon sources. We designed a non-imaging optical system to work directly with photon multiplier tubes (PMTs) for our new trap with a spherical mirror. We studied the possibility of collimating the diverging beam from the in-chamber spherical mirror by an external aspherical correlator, which may even enable efficient single-mode optical fiber coupling. In order to achieve efficient and reliable detections of fluorescence from two or more adjacent ions, we carefully characterized our Andor Luca EMCCD camera and developed a LabView program to reduce the image noise and count photons from customized sensor areas, with which we get satisfactory quiet images and fast accurate counts.