Ⅰ类高氘DKDP晶片性能研究

摘要/Abstract

摘要： 受到晶体尺寸以及非线性光学性能的影响,目前可供选择的非线性晶体非常有限。DKDP晶体作为传统大尺寸光电材料,在光参量啁啾脉冲放大(OPCPA)装置中得到了应用。高氘化的DKDP晶体有更好的光学性能,然而生长出高氘化DKDP晶体对生长环境等有更加严格的要求。本文通过改良的原料合成罐以及生长槽,采用点籽晶快速生长法成功生长出高氘DKDP晶体。按照Ⅰ类(θ=37.23°, φ=45°)切割方式制备样品,并对其氘含量、透过率、光学均匀性以及晶体激光损伤阈值进行测试。实验结果表明,晶体的平均氘含量达到98.49%,在可见-近红外波段下具有较宽的透过波段和较高的透过性能。R-on-1的测试结果显示,在3 ns、527 nm条件下,DKDP晶体的激光损伤阈值达到了19.92 J/cm²。晶体光学均匀性均方根达到了1.833×10^-9,表明晶体具有良好的光学均匀性。

关键词: DKDP, 非线性晶体, OPCPA, 高氘, 点籽晶快速生长法, 光学性能, Ⅰ类

Abstract: Due to the influence of crystal size and nonlinear optical properties, the available nonlinear crystals are very limited. As a traditional large-size photoelectric material, DKDP crystal has been applied in optical parametric chirped pulse amplification (OPCPA) devices. Highly deuterium DKDP crystals have better optical properties, but the growth of highly deuterium DKDP crystals has more stringent requirements on the growth environment. In this paper, highly deuterium DKDP crystals were successfully grown by rapid growth of point seed crystals through an improved raw material synthesis tank and the growth tank. The samples were prepared according to the type I (θ=37.23°, φ=45°) cutting method, and their deuterium content, transmittance, optical homogeneity and laser-induced damage threshold of crystals were tested. The results show that the average deuterium content of the crystal reaches 98.49%, and the crystal has a wide transmission band and high transmission performance in the visible-near infrared band. The test results of R-on-1 show that the laser-induced damage threshold of DKDP crystal reaches 19.92 J/cm² at 3 ns, 527 nm. The root-mean-square of optical homogeneity of the crystal reaches 1.833×10^-9, indicating that the crystal has good optical homogeneity.

Key words: DKDP, nonlinear crystal, OPCPA, highly deuterium, rapid growth of point seed crystal, optical property, type I

中图分类号:

O782
TB34

李鹏飞, 胡子钰, 郑国宗. Ⅰ类高氘DKDP晶片性能研究[J]. 人工晶体学报, 2022, 51(12): 2009-2013.

LI Pengfei, HU Ziyu, ZHENG Guozong. Study on the Properties of Type I Highly Deuterium DKDP Chips[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2022, 51(12): 2009-2013.

参考文献

[1] DE YOREO J J, BURNHAM A K, WHITMAN P K. Developing KH₂PO₄ and KD₂PO₄ crystals for the world’s most power laser[J]. International Materials Reviews, 2002, 47(3): 113-152.
[2] XIE X L, ZHU J Q, SUN M Z, et al. Theoretical and experimental study of 808 nm OPCPA amplifier by using a DKDP crystal[C]//SPIE Optics+Optoelectronics. Proc SPIE 10238, High-Power, High-Energy, and High-Intensity Laser Technology III, Prague, Czech Republic, 2017, 10238: 26-35.
[3] KHAZANOV E A, SERGEEV A M. Petawatt lasers based on optical parametric amplifiers: their state and prospects[J]. Physics-Uspekhi, 2008, 51(9): 969.
[4] LOZHKAREV V, FREIDMAN G, GINZBURG V, et al. Study of broadband optical parametric chirped pulse amplification in a DKDP crystal pumped by the second harmonic of a Nd∶YLF laser[J]. Laser Physics, 2005, 15: 1319-1333.
[5] KAWANAKA J, TSUBAKIMOTO K, YOSHIDA H, et al. Conceptual design of sub-exa-watt system by using optical parametric chirped pulse amplification[J]. Journal of Physics: Conference Series, 2016, 688(1): 12044.
[6] 张力元,王圣来,刘慧,等.超大尺寸KDP/DKDP晶体研究进展[J].人工晶体学报,2021,50(4):724-731.
ZHANG L Y, WANG S L, LIU H, et al. Research progress of oversized KDP/DKDP crystals[J]. Journal of Synthetic Crystals, 2021, 50(4): 724-731(in Chinese).
[7] LOZHKAREV V, FREIDMAN G, GINZBURG V, et al. Compact 0.56 Petawatt laser system based on optical parametric chirped pulse amplification in KD^*P crystals[J]. Laser Physics Letters, 2007, 4(6): 421-427.
[8] 王艳海,张福领,刘国才,等.超宽带光参量放大器中相位匹配结构的分析和优化[J].中国激光,2014,41(8):57-62.
WANG Y H, ZHANG F L, LIU G C, et al. Analysis and optimization of phase-matching configuration in ultrabroadband optical parametric amplifier[J]. Chinese Journal of Lasers, 2014, 41(8): 57-62(in Chinese).
[9] 孙子茗,刘德安,韩璐,等.基于电光调制的DKDP晶体OPCPA增益带宽特性研究[J].中国激光,2020,47(10):233-239.
SUN Z M, LIU D A, HAN L, et al. Study on gain bandwidth characteristics of DKDP-OPCPA based on electro-optic modulation[J]. Chinese Journal of Lasers, 2020, 47(10): 233-239(in Chinese).
[10] 彭翰生.超强固体激光及其在前沿学科中的应用[J].中国激光,2006,33(6):721-729.
PENG H S. Ultraintense solid-state lasers and applications to the frontiers of sciences[J]. Chinese Journal of Lasers, 2006, 33(6): 721-729(in Chinese).
[11] 孙美智,康俊,张艳丽,等.不同含氘量DKDP晶体参量匹配与放大啁啾脉冲压缩特性分析[J].光学学报,2015,35(12):228-235.
SUN M Z, KANG J, ZHANG Y L, et al. Analysis on phase matching and compression of amplified chirped pulse for various deuteration level DKDP crystals[J]. Acta Optica Sinica, 2015, 35(12): 228-235(in Chinese).
[12] SUN M Z, CUI Z J, KANG J, et al. Analysis of 808 nm centered optical parametric chirped pulse amplifier based on DKDP crystals[C]//Proc SPIE 9621, 2015, 9621: 186-193.
[13] ZHANG L S, ZHANG F, XU M X, et al. Rapid growth of a large size, highly deuterated DKDP crystal and its efficient noncritical phase matching fourth-harmonic-generation of a Nd∶YAG laser[J]. RSC Advances, 2015, 5(91): 74858-74863.
[14] CAI X M, LIN X Q, LI G H, et al. Rapid growth and properties of large-aperture 98%-deuterated DKDP crystals[J]. High Power Laser Science and Engineering, 2019, 7(3): 91-98.
[15] LI J W, ZHANG J, HU Z Y, et al. Study on directional rapid growth and properties of 90% DKDP crystal[J]. Journal of Crystal Growth, 2022, 578: 126445.
[16] 郑国宗,蔡序敏,林秀钦,等.一种高氘DKDP晶体原料的合成罐装置及合成方法:CN108149322A[P].2018-06-12.
ZHENG G Z, CAI X M, LIN X Q, et al. A synthesis tank device and synthesis method of high deuterium DKDP crystal raw material: CN108149322A[P]. 2018-06-12(in Chinese).
[17] LOIACONO G M, BALASCIO J F, OSBORNE W. Effect of deuteration on the ferroelectric transition temperature and the distribution coefficient of deuterium in K(H_1-xD_x)₂PO₄[J]. Applied Physics Letters, 1974, 24(10): 455-456.
[18] LI G H, SU G B, ZHUANG X X, et al. A new method to determine the deuterium content of DKDP crystal with thermo-gravimetric apparatus[J]. Optical Materials, 2006, 29(2/3): 220-223.