In this paper we present prospecting single crystal materials for light generation. We describe basic property borates like: Ca4GdO(BO3)3-(GdCOB), Ga4YO(BO3)3-(YCOB), Sr3Y(BO3)3-(BOYS) doped with Yb, Pr, Nd, Sm, Tm. These crystals turn out laser and non linear optical (NLO) properties. We show KY(WO4)2-(KYW) and KGd(WO4)2-(KGW) belonged to double vanadates group, and flourides LiCAlF6-(LiCAF) and LiSrAlF6-(LiSAF), their properties and growth methods. Interesting group of materials which can be used as source of light are organic compounds. Examples of these materials are presented.
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