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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Cr4+:Ca2GeO4激光晶体生长及光谱性能
Abstract:
采用助熔剂法生长了0.5%(质量分数，下同)Cr4+Ca2GeO4激光晶体。用X射线衍射(X-raydiffractometer，XRD)、吸收光谱及荧光光谱研究了晶体的相组成和光谱性能。XRD分析表明，获得的晶体为低温γ-Ca2GeO4相，镁橄榄石结构，空间群为Pbam。光谱分析表明Cr4+Ca2GeO4晶体在600～800nm范围内的吸收峰对应Cr4+的3A2→3T1能级跃迁；晶体在1000～1200nm的近红外区域的弱吸收带归因于Cr4+离子的3A2→3T2能级跃迁。室温下0.5%Cr4+Ca2GeO4晶体荧光光谱的最强荧光发射峰值位于1317nm处，这归属于Cr4+的3T2→3A2能级跃迁，荧光寿命为7.9μs，发射截面为4.61×10-19cm2。
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