After 40 years of development,laser crystals have established a firm foundation for solid state laser technology.The improvements of the crystals now on hand and the exploration of new crystals are still going on acti...After 40 years of development,laser crystals have established a firm foundation for solid state laser technology.The improvements of the crystals now on hand and the exploration of new crystals are still going on actively. 1 Development of the laser crystals now on hand 1.1 YAG YAG is a laser crystal with good property,extensive application and wide scale manufacturing.Aimed at the need of LD pumping,many new varieties of garnet have been developed,with the goal of enlarging the absorption of line width.The idea of this development is chiefly as the follows:(1)Enlarge the lattice constant through substitution of cations;(2)Waiden the absorption spectrum through the vacancy of cations;(3)Using cations with host sensitization,such as Mn 2+ ,etc.The author has considered several optional varieties:Y 2.7 La 0.25 Nd 0.05 Al 3.5 Nb 0.9 O 12 (calculating lattice constant: a 0～1.202nm,in contrast of that of YAG: a 0～1.200nm);Y 1.5 LaMn 2+ 0.5 Al 4.5 Si 0.5 O 12 ( a 0～1.205nm);and YLaMn 2+ Al 4(Nb,V) 5+ 0.6 O 12 ( a 0～1.204nm);etc.展开更多
文摘After 40 years of development,laser crystals have established a firm foundation for solid state laser technology.The improvements of the crystals now on hand and the exploration of new crystals are still going on actively. 1 Development of the laser crystals now on hand 1.1 YAG YAG is a laser crystal with good property,extensive application and wide scale manufacturing.Aimed at the need of LD pumping,many new varieties of garnet have been developed,with the goal of enlarging the absorption of line width.The idea of this development is chiefly as the follows:(1)Enlarge the lattice constant through substitution of cations;(2)Waiden the absorption spectrum through the vacancy of cations;(3)Using cations with host sensitization,such as Mn 2+ ,etc.The author has considered several optional varieties:Y 2.7 La 0.25 Nd 0.05 Al 3.5 Nb 0.9 O 12 (calculating lattice constant: a 0～1.202nm,in contrast of that of YAG: a 0～1.200nm);Y 1.5 LaMn 2+ 0.5 Al 4.5 Si 0.5 O 12 ( a 0～1.205nm);and YLaMn 2+ Al 4(Nb,V) 5+ 0.6 O 12 ( a 0～1.204nm);etc.
