Calibrating an interferometric laser frequency stabilization to megahertz precision

Brachmann, J.; Kinder, Thomas; Dieckmann, Kai

doi:10.1364/ao.51.005517

Cited by 10 publications

(4 citation statements)

References 7 publications

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“…The DCM dye in use covers a wavelength range of 640 − 690 nm with a power up to 300 mW applied to the molecules. The frequency of the dye laser is controlled by our previously described interferometric laser frequency stabilization [47], which allows continuous in-lock scanning of the frequency over many gigahertz in [46]. The results of two-photon spectroscopy for measuring the ground state energy for the X 1 Σ + |v ′′ = 0, N ′′ = 0 state are shown in Fig.…”

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confidence: 99%

Singlet Pathway to the Ground State of Ultracold Polar Molecules

et al. 2020

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Starting from weakly bound Feshbach molecules, we demonstrate a two-photon pathway to the dipolar ground state of bi-alkali molecules that involves only singlet-to-singlet optical transitions. This pathway eliminates the search for a suitable intermediate state with sufficient singlet-triplet mixing and the exploration of its hyperfine structure, as is typical for pathways starting from triplet dominated Feshbach molecules. By selecting a Feshbach state with a stretched singlet hyperfine component and controlling the polarization of the excitation laser, we assure coupling to only a single hyperfine component of the A 1 Σ + excited potential, even if the hyperfine structure is not resolved. Similarly, we address a stretched hyperfine component of the X 1 Σ + rovibrational ground state, and therefore an ideal three level system is established. We demonstrate this pathway with 6 Li 40 K molecules. By exploring deeply bound states of the A 1 Σ + potential, we are able to obtain large and balanced Rabi frequencies for both transitions. This method can be applied to other molecular species.

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confidence: 99%

Singlet Pathway to the Ground State of Ultracold Polar Molecules

et al. 2020

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“…For this measurement scans with higher resolution are performed by employing an interferometric frequency stabilization device, which provides in-lock frequency tuning of the laser in MHz steps over a large range. 47 In order to resolve the magnetic sub-structure, we iteratively adjust the spectroscopy laser power to avoid power-broadening and reduce the irradiation time. In Fig.…”

Section: Zeeman Effect For Hund's Case (C) Moleculesmentioning

confidence: 99%

Empirical LiK excited state potentials: connecting short range and near dissociation expansions

Botsi¹,

Anmin²,

Lam³

et al. 2022

Phys. Chem. Chem. Phys.

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“…Three magnetic sublevels are expected, which are denoted by M J . For this measurement scans with higher resolution are performed by employing an interferometric frequency stabilization device, which provides in-lock frequency tuning of the laser in MHz steps over a large range 47 .…”

Section: Zeeman Effect For Hund's Case (C) Moleculesmentioning

confidence: 99%

Empirical LiK excited state potentials: connecting short range and near dissociation expansions

Botsi,

Yang,

Lam

et al. 2021

Preprint

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We report on a high-resolution spectroscopic survey of 6 Li 40 K molecules near the 2S + 4P dissociation threshold and produce a fully empirical representation for the B 1 Π potential by connecting available short-and long-range data. The purpose is to identify a suitable intermediate state for a coherent Raman transfer to the absolute ground state, and the creation of a molecular gas with dipolar interactions. Starting from weakly bound ultracold Feshbach molecules, the transition frequencies to twenty-six vibrational states are determined. Our data are combined with long-range measurements [Ridinger et al., EPL, 2011, 96, 33001], and near-dissociation expansions for the spin-orbit coupled potentials are fitted to extract the C 6 dispersion coefficients. A suitable vibrational level is identified by resolving its Zeeman structure and by comparing the experimentally attained g-factor to our theoretical prediction. Using mass-scaling of the short-range data for the B 1 Π [Pashov et al., Chem. Phys. Lett., 1998, 292, 615-620] and an updated value for its depth, we model the short-and the long-range data simultaneously and produce a Rydberg-Klein-Rees curve covering the entire range.

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Calibrating an interferometric laser frequency stabilization to megahertz precision

Cited by 10 publications

References 7 publications

Singlet Pathway to the Ground State of Ultracold Polar Molecules

Singlet Pathway to the Ground State of Ultracold Polar Molecules

Empirical LiK excited state potentials: connecting short range and near dissociation expansions

Empirical LiK excited state potentials: connecting short range and near dissociation expansions

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