Growth of a large-aperture mid-infrared nonlinear optical La3Nb0.5Ga5.5O14 crystal for optical parametric chirped-pulse amplification
Growth of a large-aperture mid-infrared nonlinear optical La3Nb0.5Ga5.5O14 crystal for optical parametric chirped-pulse amplification
复制标题
用于光学参量啁啾脉冲放大的大口径中红外非线性光学La3Nb0.5Ga5.5O14晶体的生长
DOI：
10.1039/d1ce00919b
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发表时间：
2021
期刊：
影响因子：
3.1
通讯作者：
Zhang Huaijin
中科院分区：
文献类型：
--
作者：
Wang Yuzhou;Liang Fei;Wang Jiyang;Lu Dazhi;Yu Haohai;Zhang Huaijin
光学参数啁啾脉冲放大（OPCPA）技术是实现超高峰值功率激光器的关键技术，但大孔径中红外非线性晶体的高损伤阈值阻碍了该技术的发展。在这里，我们提出了La3Nb0.5Ga5.5O14 （LGN）晶体的生长和表征，其直径高达60 mm，具有高光学质量。由于抑制了二阶红外吸收，其宽带透明度高达7.4 μm。这项工作不仅为中红外OPCPA系统提供了一个有希望的候选材料，而且从结构性质的角度为合理设计非线性光学晶体提供了一种新的思路。
The optical parametric chirped-pulse amplification (OPCPA) technique is the key for achieving ultrahigh peak power lasers, whose development is hindered by the rare large aperture mid-infrared nonlinear crystals with high damage thresholds. Here, we present the growth and characterization of a La3Nb0.5Ga5.5O14 (LGN) crystal with a diameter up to 60 mm and high optical quality. Its broadband transparency up to 7.4 μm is attributed to the suppression of the second-order infrared absorption. This work not only provides a promising candidate for the mid-infrared OPCPA system, but also offers a new thought of properly designing nonlinear optical crystals from the perspective of structural properties.