高功率激光系统的发展对大尺寸、高性能磷酸二氘钾(DKDP)类晶体的需求越来越大。快速生长法较传统法可大幅缩短晶体生长周期，提高晶体生长效率。但是快速生长DKDP晶体锥面区和柱面区性能存在差异，导致不同位置的性能存在不均匀性，限制其在高功率激光系统中的应用。通过合成晶体生长溶液，采用点籽晶快速生长法生长了中等口径的高氘DKDP晶体，使用透过光谱，从线性吸收角度分析了快长DKDP晶体用作电光开关和频率转换器的可行性。结合Raman光谱技术及摇摆曲线的测试方法分析了晶体氘含量和结晶质量均匀性，为大尺寸DKDP的生长和应用提供参考。

The optical parametric chirped pulse amplification (OPCPA) near the 800 nm wavelength has gained significant popularity in the recent years. This can be attributed to the development of laboratory-scale Ndglass lasers with their associated second harmonic generation (SHG), the mature nonlinear crystal growth technology, and the commercialized mode-locked Tisapphire oscillator. In this study, the characteristics of the 808-nm centered broad bandwidth signal OPCPA based on potassium dideuterium phosphate (DKDP) crystals are investigated. The phase mismatch in DKDP crystals for different deuteration levels of 0~99% is studied and a numerical simulation of the high energy optical parameric amplification (OPA) process with the considerations of absorption and several high deuteration levels is presented. Results show that the broadband bandwidth OPCPA at 808 nm can be obtained when the deuteration level is more than 90%.

The optical parametric chirped pulse amplification (OPCPA) near the 800 nm wavelength has gained significant popularity in the recent years. This can be attributed to the development of laboratory-scale Ndglass lasers with their associated second harmonic generation (SHG), the mature nonlinear crystal growth technology, and the commercialized mode-locked Tisapphire oscillator. In this study, the characteristics of the 808-nm centered broad bandwidth signal OPCPA based on potassium dideuterium phosphate (DKDP) crystals are investigated. The phase mismatch in DKDP crystals for different deuteration levels of 0~99% is studied and a numerical simulation of the high energy optical parameric amplification (OPA) process with the considerations of absorption and several high deuteration levels is presented. Results show that the broadband bandwidth OPCPA at 808 nm can be obtained when the deuteration level is more than 90%.

The non-collinear phase-matching of 808 nm centered optical parametric amplification(OPA) is analyzed in detail in potassium dideuterium phosphate (DKDP) crystal. Phase-matching parameters for various deuteration DKDP crystals are calculated based on the concepts. Optical parametric chirped pulse amplifier(OPCPA) based on 95% deuteration DKDP crystal is designed and the output characteristics are simulated by OPA coupled wave equations for further discuss. It is concluded that DKDP crystals higher than 90% deuteration level can be utilized in ultra-short high power laser systems with compressed pulses broader than 30 fs. The disadvantage is that the acceptance angles are small, increasing the difficulty of engineering regulation.

针对在808 nm 波段的光参量放大系统(OPA)，详细分析了氘化磷酸二氢钾(DKDP)晶体非共线相位匹配的非线性过程。通过数值计算，给出了不同氘化率的DKDP 晶体参量匹配特性以及匹配参数；在此基础上，利用OPA 耦合波方程组分析了基于氘化率为95%的DKDP晶体的光参量啁啾脉冲放大器(OPCPA)的输出特性。结果显示，对大于30 fs 压缩脉宽的超短脉冲激光系统，氘化率为90%以上的DKDP 晶体具有足够的增益带宽与能量提取效率，但接收角较小，增加了工程调节难度。