EPJ Web of Conferences (Jan 2023)

Polarization-anisotropy of mid-infrared emission properties of Er3+ ions in YAlO3 crystal – INVITED

  • Nady Ahmed,
  • Cassouret Florent,
  • Loiko Pavel,
  • Normani Simone,
  • Braud Alain,
  • Chen Weidong,
  • Petrov Valentin,
  • Sun Dunlu,
  • Zhang Peixiong,
  • Viana Bruno,
  • Hideur Ammar,
  • Camy Patrice

DOI
https://doi.org/10.1051/epjconf/202328705010
Journal volume & issue
Vol. 287
p. 05010

Abstract

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We report on a polarization-resolved study of mid-infrared emission properties of Er3+ ions in the orthorhombic YAlO3 crystal. For the 4I11/2 → 4I13/2 transition, σSE reaches 0.20×10-20 cm2 at 2919 nm (for light polarization E || c). Pump-induced polarization switching between the E || b and E || c eigen-states is observed in an 10 at.% Er:YAlO3 laser. Pumped by an Yb-fiber laser at 976 nm, this laser delivers 0.77 W at 2919 nm with a slope efficiency of 31.4% being close to the Stokes limit and a laser threshold of 33 mW.