Search of optimized trivalent ytterbium doped-inorganic crystals for laser applications

Spectroscopic properties of Yb3+: LuLiF4 crystal grown by the Czochralski method for laser applications and evaluation of quenching processes: a comparison with Yb3+: YLiF4

“…Interpretation of the radiative energy transfer was already published [1,23,28,29]. This higher Yb 3+ concentration limit for the increase of the decay time in fluorides is apparently due to a weaker non-radiative energy transfer effect or self-quenching than in oxides because of their lower phonon energy.…”

“…Our group has been investigating, during these latest years, the spectroscopic properties of several Yb 3+ -doped single crystal oxides and a new general method of evaluation was pointed out depending on the oscillator or the amplifier regimes [1,2]. In order to be completed, this study should include fluoride single crystals, another crystal family very useful for optical applications like laser sources.…”

Why so deep research on Yb3+-doped optical inorganic materials?

“…These methods allow the development of characterization of optical parameters in solid-state samples, and also the growth of flexible single crystal laser fibres which might be mainly used as high average power solid-state lasers under high-power laser diode. We have chosen to study Y 3 Al 5 O 12 (YAG) yttrium aluminium garnet [13][14][15][16], Gd 3 Ga 5 O 12 (GGG) gadolinium gallium garnet [17,18], Y 2 O 3 yttria sesquioxide [14][15][16][17][18][19][20] and CaF 2 [21] fluoride as typical examples of Yb 3+ -doped hosts, which are considered among important laser crystals due to their unusual combination of favourable properties. The room temperature absorption and emission of spectra of Yb 3+ -doped YAG crystals, which were grown by LHPG technique, are shown in Fig.…”

Crystal growth and spectroscopic characterization of Yb-doped and Yb, Na-codoped PbF2 laser crystals

“…This makes it possible to avoid up-conversion, excited state absorption and concentration quenching within a large concentration domain. Up to now, several oxides have been thoroughly investigated, and the spectroscopic properties of Yb 3+ -doped host materials are leading to general methods of evaluation [1][2][3][4][5][6][7].…”