CC BY
0The 30th International Conference on Advanced Laser Technologies P-I-13
ALT'23
Thulium BEC as a diagnostic tool for a laser light with wavelength
of 1064 nm
V.V. Tsyganok 1, D.A. Pershin 12, V.A. Khlebnikov 1, D.A. Kumpilov1'3, I.A. Pyrkh14, A.E. Rudnev13, E.A. Fedotova13, D.V. Gaifudinov13, I.S. Cojocaru1,2, K.A. Khoruzhii1,3, P.A. Aksentsev1,4, A.K. Zy-
kova1 and A.V. Akimov125
1Russian Quantum Center, Bolshoy Boulevard 30, building 1, Skolkovo, 143025, Russia 2PN Lebedev Institute RAS, Leninsky Prospekt 53, Moscow, 119991, Russia 3Moscow Institute of Physics and Technology, Institutskii pereulok 9, Dolgoprudny, Moscow Region 141701, Russia 4Bauman Moscow State Technical University, 2nd Baumanskaya, 5, Moscow, 105005, Russia 5National University of Science and Technology MISIS, Leninsky Prospekt 4, Moscow, 119049, Russia
The report is devoted to the use of thulium BEC to study the intensity distribution of optical lattice (OL) that is formed by two crossed laser beams with a wavelength of 1064 nm inside a vacuum chamber. Such configuration of beams create a periodic potential:
U (z ) = U0sin2 (kLz), (1)
where UQ is the depth of the OL, kL — |/c, -k^jl — njXL is one-half of the magnitude of the reciprocal lattice vector, k] and k2 are wave-vectors of OL beams, — /./(2 sin (o')j is a lattice period, 2a = [k{,k2 j . The configuration of beams in the chamber could be imprinted on the matter wave of condensate in position space via the Kapitsa-Dirac (or Raman-Nath) effect.
Analyzing the obtained results of the BEC expansion after a short-term exposure to a periodic potential, we found that the self-reflections of the lattice beams from the viewports of vacuum chamber create a significant parasitic potential. This effect helps us to reproduce the intensity distribution of the OL in region were BEC is located.
The work was supported by Rosatom in the framework of the Roadmap for Quantum computing (Contract No. 868-1.3-15/15-2021 dated October 5, 2021).
