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Phys Rev Lett. 2010 Jul 9;105(2):023001. Epub 2010 Jul 7.

Efficient fiber optic detection of trapped ion fluorescence.

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National Institute of Standards and Technology, Division 847.10, 325 Broadway Street, Boulder, Colorado 80305, USA.


Integration of fiber optics may play a critical role in the development of quantum information processors based on trapped ions and atoms by enabling scalable collection and delivery of light and coupling trapped ions to optical microcavities. We trap 24Mg+ ions in a surface-electrode Paul trap that includes an integrated optical fiber for detecting 280-nm fluorescence photons. The collection numerical aperture is 0.37, and total collection efficiency is 2.1%. The ion can be positioned between 80 and 100 μm from the tip of the fiber by use of an adjustable rf pseudopotential.

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