Nd:KGW
Nd:KGW晶体是一种可以实现高浓度掺杂的激光晶体,因为该晶体可以与高浓度的Nd离子混合并且具有较大的发射面积,因此其单脉冲和低重复激光性能优于Nd:YAG 。Nd:KGW晶体的吸收带在808 nm处,可以有效地与LD泵浦光源耦合(发射波长为808 nm),从而提高其发光效率。此外,它的半高和半宽为12 nm,使其能够适应LD发射波长随温度的漂移,这有利于进行二极管泵浦KGw激光实验和器件研究。Nd:KGW不仅可以实现自由振荡,Q开关,锁模操作,还可以实现拉曼转换。
Nd:KGW晶体是由受激拉曼散射产生的晶体,经过倍频后可以成为可见光波段的多波长光源。
Nd:KGW晶体的拉曼特性取决于其高激发光束截面、低泵浦阈值、高输出能量、高转换效率以及两个高拉曼增益系数(768和901 cm-1)。拉曼晶体的基频光分别为911 nm,1067 nm和1351 nm,经过倍频后可产生0.455 um,0.533 um和0.675 um的红,黄和蓝光,可用于材料加工,光通信,遥感,医药,环境监测,精密计量等领域。
物理性质
Nd浓度 | 2.2%(cw),3%(quasi-cw) |
荧光寿命 | 130 μs |
受激发射截面 | 3.7*10-19 cm2 |
跃迁波长 | 1067 nm |
导热系数 | Ka=2.6 W/Km |
Kb=3.8 W/Km | |
Kc=3.4 W/Km | |
dn / dT | 0.4*10-6 K-1 |
折射率@ 1.06μm | np=1.978 |
nm=2.014 | |
ng=2.049 | |
热膨胀系数 | (100):4*10-6 K-1 |
(010):3.6*10-6 K-1 | |
(001):8.5*10-6 K-1 | |
密度(g * cm-3) | 7.248 |
比热容Cp | 500 Jkg-1K-1 |
光谱性质
激光波长(nm) | 1067 |
---|---|
发射截面(pm2)a | 32.3 |
增益带宽(nm) | 2.73 |
荧光寿命(μs) | 110 at 3% doping |
导热系数(Wm-1K-1) | ~3 |
吸收和发射光谱
参考文献
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