Magnetic g tensors for the 4I15∕ 2 and 4I13∕ 2 states of Er3+:Y2SiO5

Alla I. Belyaeva, V. V. Eremenko, V. N. Pavlov +1 more

V I Zhekov, Vladimir A. Lobachev, T. M. Murina +3 more

Lasing was induced in Y1.5Er1.5Al5O12 (λ = 2.94 μm) crystals by selective pumping of the electronic–vibrational wing of the 4I15/2–4I13/2 transition. A population inversion was established in this YAG:Er3+ laser by a strong interaction between the excited Er3+ ions at the 4I13/2 level and the transfer of energy from the lower active level to the upper one in accordance with the 4I13/2–4I9/2, 4I13/2–4I15/2 scheme.

Stanley M. Kulpa

V. N. Lisin, Шегеда Анатолий Михайлович, В. В. Самарцев

Abstract The pseudo-Stark shift in the optical frequency of the 4F9/2–4I15/2 transition of an Er3+ ion in a Y2SiO5 matrix under the action of a weak pulsed electric field is measured from changes in the amplitude and temporal shape of the photon echo.

Brian M. Tissue, John Curtis Wright

Haitao Zhang, Jun Mo Yang, Jason A. Brown +4 more

La3+ is used as an index modifier to tune the refractive index of Er3+ doped Y2O3 transparent ceramics without reducing the coherence lifetime of Er3+ 4I13/2−4I15/2 transition. La3+ and Er3+ are incorporated into Y2O3 through a solution-phase nanoparticle synthesis and nanoparticles are sintered into transparent ceramics by hot isostatic press. The maximum La3+ doping concentration is about 10%, which increases the refractive index of Y2O3 by 0.009 (Δn/n = 0.48%). La3+ doping doesn’t reduce Er3+ optical coherence lifetime. The homogeneous linewidth of Er3+(20 ppm) 4I13/2−4I15/2 transition in La3+ doped Y2O3 ceramics is about 10 kHz at 2 K and 0.65 T, which is close to the reported homogeneous linewidth in Er3+ doped Y2O3 ceramics and single crystals. Such La3+ Er3+ co-doped Y2O3 ceramics are proper materials to fabricate optical waveguides for quantum memory applications.