Korea Photonics Technology Institute

Eui Sam Lee

June Soo Park

Ju Hyeon Choi

Jung Whan In

Disclosed is fluorophosphate glasses for an active device, the fluorophosphate glasses including: a metaphosphate composition including Mg(PO)of about 20 mol % to about 60 mol %; a fluoride composition including BaFof about 20 mol % to about 60 mol % and CaFof about 0 mol % to about 40 mol %; and dopants including rare earth elements, in which there is an effect of increasing a carrier lifetime at a metastable state energy level that is stimulated-emitted due to an efficient energy transfer phenomenon by composition optimization of dopants (e.g. Er and Yb).

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Incheon, South Korea

Eui Sam Lee