PURPOSE: To provide a light amplifier which has excellent performance and is low-priced and is suitable to be used in a light network on the premises by making an energy gap between an excited energy level of rare earth ions during excitation and a base energy level at least four times low frequency vibration energy.
CONSTITUTION: An amplifying medium includes a complex of rare earth ions and a ligand, and the complex is dissolved in a polymer matrix. An energy gap between an excited energy level of rare earth ions during excitation and a base energy level is made at least four times as low as frequency vibration energy. Here the ligand is a β-diketone as shown by the formula. In the formula, X, Y represent a 1-10C alkyl group which can be substituted by an aromatic hydrocarbon group, particularly a benzene group or an aliphatic hydrocarbon group, particularly a halogen atom, Z represents a hydrogen atom, a halogen atom, a 1-10C alkyl group which can be substituted by a a halogen atom, or a nitro group.
ARIE RONBERUTASU FUAN DOORUN
EMIRIANUSU GURADOUSU YOHANNUSU
