Simultaneous dual-species laser cooling using an optical frequency comb

Buhin, Danijel; Kovačić, Domagoj; Schmid, Fabian; Kruljac, Mateo; Vulić, Vjekoslav; Ban, Ticijana; Aumiler, Damir

doi:10.1103/physreva.102.021101

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…The research on optical frequency comb in Western Balkans is recognized at three institutions denoted in the Figure 1, Institute of Physics in Zagreb, Croatia, University of Ljubljana-Faculty of Electrical Engineering, Slovenia, and authors' affiliation institution, University of Belgrade-School of Electrical Engineering, Serbia. The OFCs research at the premises of Institute of Physics, Zagreb is oriented toward atomic and molecular physics, dealing with use of optical frequency combs for atom cooling [14]- [16] and inducing radiation pressure force on atoms [17], [18]. The research can be reflected by "Frequency comb cooling of atoms" (CoolComb) project [19], which aims to create the tools that will allow the extension of laser cooling to more diverse species of atoms and molecules, focusing on rubidium (Rb) atoms and two Rb isotopes.…”

Section: Introductionmentioning

confidence: 99%

Optical Frequency Comb Generation and Further Advances From the Photonics Community in Serbia and Western Balkans

Krstić,

Crnjanski,

Gvozdić

2023

IEEE Photonics J.

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The paper presents a short statistical overview of photonics research in the Western Balkans, with more spotlight aimed at the field of optical frequency combs with focus on the overview of the research conducted at the University of Belgrade-School of Electrical Engineering. We give a review of proposed schemes for single and dual optical frequency combs generation, based on optimized gain-switching and electrooptic modulator operation and expand our previous results with analytical approximations for comb lines intensities for the gainswitched laser.

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Section: Introductionmentioning

confidence: 99%

Optical Frequency Comb Generation and Further Advances From the Photonics Community in Serbia and Western Balkans

Krstić,

Crnjanski,

Gvozdić

2023

IEEE Photonics J.

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Frequency-comb-induced radiation pressure force in dense atomic clouds

Kruljac¹,

Buhin²,

Kovačić³

et al. 2022

J. Opt. Soc. Am. B

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We investigate the frequency-comb-induced radiation pressure force acting on a cloud of cold 87 R b atoms. Reduction and spectral broadening of the frequency comb force are observed as the cloud’s optical thickness is increased. Since the radiation pressure force is uniquely determined by light scattered by an atomic cloud, we discuss different scattering mechanisms and point to the shadow effect as the dominant mechanism affecting the FC-induced force in resonantly excited dense atomic clouds. Our results improve the understanding of the interaction of frequency comb light with many-atom ensembles, which is essential for novel frequency comb applications in simultaneous multispecies cooling and self-ordering, multimode quantum memories, and quantum computing.

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Optical Frequency Comb-Based Direct Two-Photon Cooling for Cold Atom Clock

Dan

Guo

et al. 2022

Photonics

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The performance of the cold atom clock based on coherent population trapping (CPT) improved when the temperature decreased. In order to obtain a lower temperature in the cold atom clock, we proposed a cooling scheme in this paper that employs direct two-photon transition using optical frequency combs (OFCs). Two trains of time-delayed pulses from opposite directions were utilized to interact with atoms. It was found that the temperature of the cold atoms reached the minimum if the pulse area was π and the time delay between the absorption pulse and the stimulated emission pulse was in the range from 0.7τ to τ. In this paper, it was confirmed that the proposed cooling process allowed for faster and more efficient momentum exchange between light and atoms, and the proposed cooling process could be applied to the atoms or molecules that could not be cooled to desired temperature through the single-photon cooling process. The 87Rb cooling, together with the CPT interrogating scheme using OFCs reduced the ratio value of linewidth/contrast, and the frequency stability of the cold atom clock hence improved by more than six times as per our calculation.

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Simultaneous dual-species laser cooling using an optical frequency comb

Cited by 3 publications

References 31 publications

Optical Frequency Comb Generation and Further Advances From the Photonics Community in Serbia and Western Balkans

Optical Frequency Comb Generation and Further Advances From the Photonics Community in Serbia and Western Balkans

Frequency-comb-induced radiation pressure force in dense atomic clouds

Optical Frequency Comb-Based Direct Two-Photon Cooling for Cold Atom Clock

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