Optical Characterization Of A Phase Fresnel Lens For Trapped Ion Quantum Computing
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To efficiently collect light from ions in a trapped ion quantum computer, a lens with a high numerical aperture is advantageous. Using phase Fresnel lenses with large working distances and high numerical apertures, we can couple a large fraction of the fluorescence from an ion into a single optical propagation mode (TEM00). We have optically profiled a phase Fresnel lens with a numerical aperture of 0.64 and a focal length of 3 mm. A 350ᱵ nm beam waist and a beam quality M2 of 1.08ᰮ05 was measured near the diffraction limit.
Proceedings of the Australasian Conference on Optics, Lasers, and Spectroscopy and Australian Conference on Optical Fibre Technology in association with the International Workshop on Dissipative Solitons 2009
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Classical and Physical Optics