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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 11 — Apr. 10, 2008
  • pp: 1816–1831

Doppler-free, multiwavelength acousto-optic deflector for two-photon addressing arrays of Rb atoms in a quantum information processor

Sangtaek Kim, Robert R. Mcleod, M. Saffman, and Kelvin H. Wagner  »View Author Affiliations


Applied Optics, Vol. 47, Issue 11, pp. 1816-1831 (2008)
http://dx.doi.org/10.1364/AO.47.001816


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Abstract

We demonstrate a dual wavelength acousto-optic deflector (AOD) designed to deflect two wavelengths to the same angles by driving with two RF frequencies. The AOD is designed as a beam scanner to address two-photon transitions in a two-dimensional array of trapped neutral Rb 87 atoms in a quantum computer. Momentum space is used to design AODs that have the same diffraction angles for two wavelengths (780 and 480 nm ) and have nonoverlapping Bragg-matched frequency response at these wavelengths, so that there will be no cross talk when proportional frequencies are applied to diffract the two wavelengths. The appropriate crystal orientation, crystal shape, transducer size, and transducer height are determined for an AOD made with a tellurium dioxide crystal ( TeO 2 ). The designed and fabricated AOD has more than 100 resolvable spots, widely separated band shapes for the two wavelengths within an overall octave bandwidth, spatially overlapping diffraction angles for both wavelengths (780 and 480 nm ), and a 4 μs or less access time. Cascaded AODs in which the first device upshifts and the second downshifts allow Doppler-free scanning as required for addressing the narrow atomic resonance without detuning. We experimentally show the diffraction-limited Doppler-free scanning performance and spatial resolution of the designed AOD.

© 2008 Optical Society of America

OCIS Codes
(230.1040) Optical devices : Acousto-optical devices
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Optical Devices

History
Original Manuscript: November 8, 2007
Manuscript Accepted: December 7, 2007
Published: April 9, 2008

Citation
Sangtaek Kim, Robert R. Mcleod, M. Saffman, and Kelvin H. Wagner, "Doppler-free, multiwavelength acousto-optic deflector for two-photon addressing arrays of Rb atoms in a quantum information processor," Appl. Opt. 47, 1816-1831 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-11-1816

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