中国激光, 2013, 40 (7): 0702004, 网络出版: 2013-06-08   

大口径KDP晶体实现高效三倍频转换的新型支撑结构

A Mounting Configuration for Efficient Third Harmonic Conversion of KDP Crystals with Large Aperture
作者单位
1 西南技术物理研究所, 四川 成都 610041
2 中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
3 四川大学 电子信息学院, 四川 成都 610065
摘要
提出了一种新型支撑结构以解决大口径晶体重力凹陷作用引起的三倍频转换效率损失问题。有限元分析结果表明:当KDP晶体及支撑结构均为理想平面时,重力作用导致的三倍频转换效率的损失量几乎为0。同时,针对不同倾斜角度下的接触面加工误差对三倍频转换效率的影响进行了大量的数值模拟。计算结果表明:采用新型支撑结构,不同倾斜角度对三倍频转换效率的影响基本相同;支撑结构表面存在随机加工误差对三倍频转换效率的影响程度较小;而当支撑结构存在凸形或凹形加工误差时,加工误差容许值必须控制在5 μm范围内以实现高效三倍频输出。
Abstract
A mounting configuration is presented to solve the loss of the third harmonic generation (THG) efficiency due to the gravitational effects. The analysis result of finite element model shows that the loss of the THG efficiency is nearly absent due to the gravitational effects when the original surface profile of the KDP crystals and mounting configuration is an ideal plane. Meanwhile, numerical simulation calculations are performed to analyze the influence of fabrication errors on the THG efficiency. Furthermore, the machining requirements of the peripheral milling have been discussed. The loss of the THG efficiency is nearly same under the different departure angles. The mounting configuration with the random error is acceptable, but the convex error and concave error should be controlled below 5 μm to realize efficient third harmonic output.
参考文献

[1] P J Wegner, M A Henesian, D R Speck, et al.. Harmonic conversion of large-aperture 1.05-μm laser beams for inertial-confinement fusion research[J]. Appl Opt, 1992, 31(30): 6414-6426.

[2] 林尊琪. 激光核聚变的发展[J]. 中国激光, 2010, 37(9): 2202-2207.

    Lin Zunqi. Progress of laser fusion[J]. Chinese J Lasers, 2010, 37(9): 2202-2207.

[3] 王文义, 赵润昌,粟敬钦, 等. 神光Ⅲ原型装置初步的激光脉冲整形实验[J]. 光学学报, 2010, 30(4): 1051-1054.

    Wang Wenyi, Zhao Runchang, Su Jingqin, et al.. Preliminary laser-pulse-shaping experiment on technical integration line[J]. Acta Optica Sinica, 2010, 30(4): 1051-1054.

[4] C A Haynam, P J Wegner, J M Auerbach, et al.. National Ignition Facility laser performance status[J]. Appl Opt, 2007, 46(16): 3276-3303.

[5] H M George, I M Edward, R W Craig. The National Ignition Facility[J]. Opt Eng, 2004, 43(12): 2841-2843.

[6] E I Moses, R E Bonanno, C A Haynam, et al.. The National Ignition Facility: path to ignition in the laboratory[J]. Eur Phys J D, 2007, 44(2): 215-218.

[7] M L Spaeth, K R Manes, C C Widmayer, et al.. National Ignition Facility wavefront requirements and optical architecture[J]. Opt Eng, 2004, 43(12): 2854-2857.

[8] 代万俊, 张崑,张鑫, 等. 神光-Ⅲ原型装置全光路系统波前测量方法[J]. 中国激光, 2011, 38(2): 0202007.

    Dai Wanjun, Zhang Kun, Zhang Xin, et al.. Entire beam wavefront measurement in prototype of SG-Ⅲ facility[J]. Chinese J Lasers, 2011, 38(2): 0202007.

[9] J M Auerbach, C E Barker, S A Couture, et al.. Modeling of frequency doubling and tripling with converter refractive index spatial non-uniformities due to gravitational sag[C]. SPIE, 1999, 3492: 472-474.

[10] L Olivier, G Claude. Modeling of the effects of KDP crystals gravity sag on third harmonic generation[C]. SPIE, 1999, 3492: 802-808.

[11] 贾凯, 袁晓东, 徐旭, 等. 夹持方式对KDP晶体三倍频转换效率的影响[J]. 强激光与粒子束, 2011, 23(6): 1553-1558.

    Jia Kai, Yuan Xiaodong, Xu Xu, et al.. Influence of clamping modes in KDP crystal on conversion efficiency of third harmonic generation[J]. High Power Laser and Particle Beams, 2011, 23(6): 1553-1558.

[12] S Moaveni. Finite Element Analysis: Theory and Application with ANSYS[M]. London: Prentice Hall PTR Upper Saddle River, 1999. 168-231.

[13] P W Milonni, J M Auerbach, D Eimerl. Frequency conversion modeling with spatially and temporally varying beams[C]. SPIE, 1997, 2633: 230-241.

[14] Y Altintas, D Montgomery, E Budak. Dynamic peripheral milling of flexible structures[J]. J Engineering for Industry, 1992, 114(2): 137-145.

[15] M Wan, W H Zhang, K P Qiu. Numerical prediction of static form errors in peripheral milling of thin-walled workpieces with irregular meshes[J]. J Manufacturing Science and Engineering, 2005, 127(1): 13-22.

贾凯, 熊召, 杨闯, 高恒, 徐攀, 杨峰, 张彬. 大口径KDP晶体实现高效三倍频转换的新型支撑结构[J]. 中国激光, 2013, 40(7): 0702004. Jia Kai, Xiong Zhao, Yang Chuang, Gao Heng, Xu Pan, Yang Feng, Zhang Bin. A Mounting Configuration for Efficient Third Harmonic Conversion of KDP Crystals with Large Aperture[J]. Chinese Journal of Lasers, 2013, 40(7): 0702004.

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