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Multiple-camera defocus imaging of ultracold atomic gases

Perry, A. R. and Sugawa, S. and Salces-Carcoba, F. and Yue, Y. and Spielman, I. B. (2021) Multiple-camera defocus imaging of ultracold atomic gases. Optics Express, 29 (11). pp. 17029-17041. ISSN 1094-4087. doi:10.1364/oe.422981.

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In cold atom experiments, each image of light refracted and absorbed by an atomic ensemble carries a remarkable amount of information. Numerous imaging techniques including absorption, fluorescence, and phase-contrast are commonly used. Other techniques such as off-resonance defocused imaging (ORDI, [1–4]), where an in-focus image is deconvolved from a defocused image, have been demonstrated but find only niche applications. The ORDI inversion process introduces systematic artifacts because it relies on regularization to account for missing information at some spatial frequencies. In the present work, we extend ORDI to use multiple cameras simultaneously at degrees of defocus, eliminating the need for regularization and its attendant artifacts. We demonstrate this technique by imaging Bose-Einstein condensates, and show that the statistical uncertainties in the measured column density using the multiple-camera off-resonance defocused (McORD) imaging method are competitive with absorption imaging near resonance and phase contrast imaging far from resonance. Experimentally, the McORD method may be incorporated into existing set-ups with minimal additional equipment.

Item Type:Article
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URLURL TypeDescription Paper
Spielman, I. B.0000-0003-1421-8652
Additional Information:© 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Received 17 Feb 2021; revised 13 Apr 2021; accepted 11 May 2021; published 19 May 2021. We thank D. Barker and A. Putra for their careful and thorough reading of this manuscript. We appreciate the efforts of E. Altuntas, R. P. Anderson, Q.-Y. Liang, D. Trypogeorgos, and A. Valés-Curiel for employing defocus imaging in their experiments, and motivating the completion of this manuscript. Funding. National Institute of Standards and Technology; Army Research Office; Air Force Office of Scientific Research; National Science Foundation. Data availability. Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request. The authors declare no conflicts of interest.
Funding AgencyGrant Number
National Institute of Standards and Technology (NIST)UNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Issue or Number:11
Record Number:CaltechAUTHORS:20210626-222733402
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Official Citation:A. R. Perry, S. Sugawa, F. Salces-Carcoba, Y. Yue, and I. B. Spielman, "Multiple-camera defocus imaging of ultracold atomic gases," Opt. Express 29, 17029-17041 (2021)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109610
Deposited By: George Porter
Deposited On:28 Jun 2021 20:00
Last Modified:16 Nov 2021 19:37

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