Characteristics of nonlinear optical absorption and refraction for KDP and DKDP crystals
Characteristics of nonlinear optical absorption and refraction for KDP and DKDP crystals
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KDP和DKDP晶体的非线性光学吸收和折射特性
DOI：
10.1364/ome.7.000533
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发表时间：
2017-02-01
影响因子：
2.8
通讯作者：
Lu, Chengwei
中科院分区：
文献类型：
--
作者：
Wang, Duanliang;Li, Tingbin;Lu, Chengwei
用常规降温法生长了高质量的氘含量为12%、70%和80%的KDP和DKDP晶体。采用Z扫描方法，系统研究了K（DxH 1-x）2 PO 4晶体在波长532 nm处的非线性光学特性，包括非线性吸收和非线性折射。结果表明，非线性吸收和非线性折射的存在，非线性折射率为正表示自聚焦效应的产生。研究结果还表明，非线性吸收和折射与晶体的晶向和结构有关，特别是与H2 PO 4的分布有关
- 或D2 PO 4
- 组对于K（DxH 1-x）2 PO 4晶体，β的变化规律为z > I > II，而n2（或χR（3））的变化规律为z > II> I。这些结果将引起人们对KDP和DKDP应用，特别是频率转换和电光开关的更多关注。
High-quality KDP and DKDP crystals with 12%, 70% and 80%-deuterium content were grown by the conventional temperature cooling method. The nonlinear optical characteristics of K(DxH1-x)2PO4 crystals, including nonlinear absorption and refraction, were systematically investigated through the Z-scan method at λ = 532 nm. The results demonstrate the existence of nonlinear absorption and refraction, and a nonlinear refractive index with a positive sign indicates the generation of self-focusing effect. Moreover, the results indicate that nonlinear absorption and refraction were associated with crystal direction and structure, especially the distribution of H2PO4
- or D2PO4
- groups. For K(DxH1-x)2PO4 crystals, a similar rule of β was z > I > II, while n2 (or χR(3)) was z > II ≈I. These results will evoke more attention to KDP and DKDP applications, especially frequency conversion and electro-optic switch.