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用提拉法生长了掺铬、钕的钆镓石榴石(Cr4+,Nd3+∶GGG)自调Q激光晶体。报道了室温下的吸收光谱和荧光光谱特性。分析了Cr离子浓度对光谱性质的影响。比较了Cr4+∶GGG,Nd3+∶GGG和(Cr4+,Nd3+)∶GGG晶体吸收光谱的关系。测量了(Cr4+,Nd3+)∶GGG晶体和Nd3+∶GGG晶体的荧光寿命,它们分别是33μs和250μs。实验表明,(Cr4+,Nd3+)∶GGG晶体是一种非常有潜力的自调Q激光晶体,可以实现大功率激光器的小型化和全固态化。
The chrome and neodymium gadolinium gallium garnet (Cr4 +, Nd3 +: GGG) self-Q-switched laser crystals were grown by Czochralski method. The absorption and fluorescence spectra at room temperature are reported. The influence of Cr ion concentration on the spectral properties was analyzed. The relationship between the absorption spectra of Cr4 +: GGG, Nd3 +: GGG and (Cr4 +, Nd3 +): GGG crystals was compared. The fluorescence lifetime of (Cr4 +, Nd3 +): GGG crystals and Nd3 +: GGG crystals was measured, which were 33 μs and 250 μs, respectively. Experiments show that (Cr4 +, Nd3 +): GGG crystal is a very promising self-Q-switched laser crystal, which can realize the miniaturization and solid-state of high power laser.