Open AccessBose-Einstein condensation of photons in a long fiber cavity
Author(s) -
Rafi Weill,
Alexander Bekker,
Boris Levit,
Baruch Fischer
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.430406
Subject(s) - photon , optics , physics , bose–einstein condensate , ytterbium , fiber , dispersion (optics) , condensation , materials science , condensed matter physics , laser , composite material , thermodynamics
We demonstrate photon Bose-Einstein condensation (photon-BEC) at a broad temperature range that is valid also in the long 1D fiber cavity limit. It is done with an erbium-ytterbium co-doped fiber (EYDF) cavity by overcoming the challenging requirement of sublinear light dispersion for BEC in 1D using a chirped-gratings Fabry-Perot. We experimentally show with a square-root mode-dispersion, a quadratic temperature dependence of the critical power for condensation (compared to a linear dependence in finite regular fiber-cavities) between 90 K and 382 K, as the theory predicts.