Naslov
Crossed optical cavities with large mode diameters

Autori
Heinz, André ; Trautmann, Jan ; Šantić, Neven ; Jihyun Park, Annie ; Bloch, Immanuel ; Blatt, Sebastian

Izvornik
Optics Letters (0146-9592) 46 (2021), 2; 250-253

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
quantum simulation ; ultracold atoms ; optical lattices

Sažetak
We report on a compact, ultrahigh-vacuum compatible optical assembly to create large- scale, two-dimensional optical lattices for use in experiments with ultracold atoms. The assembly consists of an octagon-shaped spacer made from ultra-low-expansion glass, to which we optically contact four fused silica cavity mirrors, making it highly mechanically and thermally stable. The mirror surfaces are nearly plane-parallel, which allows us to create two perpendicular cavity modes with diameters ∼1mm. Such large mode diameters are desirable to increase the optical lattice homogeneity, but lead to strong angular sensitivities of the coplanarity between the two cavity modes. We demonstrate a procedure to precisely position each mirror substrate that achieves a deviation from coplanarity of 𝑑=1(5)µm. Creating large optical lattices at arbitrary visible and near-infrared wavelengths requires significant power enhancements to overcome limitations in the available laser power. The cavity mirrors have a customized low-loss mirror coating that enhances the power at a set of relevant visible and near-infrared wavelengths by up to 3 orders of magnitude.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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