Classification of noncentrosymmetric oxides with RE~(3+) ions applicable for self frequency doubling (SFD) laser crystals

摘要

A set of rare-earth (RE) noncentrosymmetric (NCS) binary and ternary oxides has been compiled in tables including nonlinear optical (NLO) properties, structure and shortest chemical bond lengths, L(E-O) < 200 pm < L(M-O). The field of such crystals has been defined on the plane of L(E,M-O) bond lengths as a rosette of two ellipses of 《 acentricity 》. The areas are specified for creation of laser active RE-elements and compared for different combination of such elements as La~(3+)-Nd~(3+), Y~(3+)-Nd~(3+), Y~(3+)-Yb~(3+), where La~(3+), Y~(3+)-contained oxides are laser matrix, and Nd~(3+), Yb~(3+) are suitable active constituents of self activated (SA) and self frequency doubling solid state lasers (SFD-SSL). It is note that crystals with cubic structure, and crystals are positioned out the 《 acentricity 》 rosette are not useful for creation of the SFD-SSL.