YAG晶体中Cr^(4+)和Yb^(3+)的光谱和荧光特性研究

Spectral and Luminescence Properties of Cr^(4+) and Yb^(3+) ions in YAG

报道了（Ｃｒ４＋ ， Ｙｂ３＋ ）ｖＹＡＧ晶体的吸收光谱和荧光光谱特性。在室温下， （Ｃｒ４＋ ， Ｙｂ３＋ ）ｖＹＡＧ晶体在９３７ ｎｍ 和９６８ ｎｍ 处存在两个吸收带， 能与ＩｎＧａＡｓ激光二极管有效耦合； 而且在１０３０ ｎｍ 处有一Ｃｒ４＋ 吸收峰， 可以实现对Ｙｂ３＋ 的自调Ｑ激光输出。（Ｃｒ４＋ ， Ｙｂ３＋ ）ｖＹＡＧ晶体的荧光光谱与Ｙｂ３＋ ｖＹＡＧ晶体一样， 发光中心也是位于１０２９ ｎｍ ， 但其强度比Ｙｂ３＋ ｖＹＡＧ 晶体的要低。（Ｃｒ４＋ ， Ｙｂ３＋ ）ｖＹＡＧ晶体和Ｙｂ３＋ ｖＹＡＧ晶体的荧光寿命分别为０．３ ｍ ｓ 和１．４ ｍ ｓ。因此双掺Ｃｒ４＋ 和Ｙｂ３＋ 的ＹＡＧ晶体将有可能成为一种自调Ｑ激光晶体， 从而实现固体激光器的小型化，

The spectral and luminescence properties of (Cr 4+ , Yb 3+ )∶YAG crystal, and the absorption spectra of Cr 4+ ∶YAG crystal and Yb 3+ ∶YAG crystal are reported. In the absorption spectra of (Cr 4+ , Yb 3+ )∶YAG crystal, there are two absorption bands at 937 nm and 968 nm respectively, which are suitable for InGaAs diode laser pumping; and there is a absorption band of Cr 4+ at 1030 nm, which is suitable for passive Q switched laser output at 1030 nm. This (Cr 4+ , Yb 3+ ) codoped YAG crystal may be a promising material for compact, efficient and high stable diode laser pumped solid state passive Q switched laser.