Impact of spatial modulation on the third harmonic wave propagation and far-field focal spot in frequency conversion system
Impact of spatial modulation on the third harmonic wave propagation and far-field focal spot in frequency conversion system
复制标题
空间调制对变频系统三次谐波传播及远场焦斑的影响
DOI：
10.1016/j.ijleo.2014.01.084
复制
发表时间：
2014-07
期刊：
影响因子：
3.1
通讯作者：
M. Z. Sun, J.Y. Zhang, Y.L. Zhang, Q.Y. Bi, X.
中科院分区：
文献类型：
--
作者：
M. Z. Sun, J.Y. Zhang, Y.L. Zhang, Q.Y. Bi, X.
讨论了大型激光装置变频系统中使用的KDP晶体中高功率激光的三次谐波产生（THG）。基于非线性耦合波方程的数值模拟，考虑了走离效应和傍轴衍射效应，并对基波（1053 nm，1ω）脉冲的电场进行了空间域相位和幅度调制，得到了三次谐波远场焦斑。详细分析了调制深度和调制频率对焦斑能量、旁瓣位置和转换效率的影响。结果表明，相位调制和幅度调制的调制频率等效地决定了旁瓣的位置，而1ω调制深度的存在使旁瓣能量集中度降低。由于各种原因，相位调制在降低主瓣能量方面比幅度调制起着更重要的作用。相位调制使能量从主瓣流向副瓣，而幅度调制不仅使能量流向副瓣，而且显著降低了三倍频效率。
Third harmonic generation (THG) of high power laser is discussed in KDP crystals utilized in frequency conversion systems of large laser facilities. The far-field focal spot of the third harmonic wave is presented based on numerical simulation of the nonlinear coupled-wave equations, in which the walk-off and paraxial diffraction are taken into account and the electric field of the fundamental wave (1053 nm, 1ω) pulse is phase and amplitude modulated in spatial domain. Impact of the modulation depth and frequency on the focal spot energy, the side lobes location and conversion efficiency are analyzed in detail. The results show that the side lobes location is equivalently determined by the modulation frequency of both phase modulation and amplitude modulation, while the energy-concentration is decreased mostly because of the 1ω modulation depth. Relatively, the phase modulation plays a more important role than the amplitude modulation in decreasing main lobe energy for different reasons. The phase modulation makes the energy flowing from the main lobe to side lobes, while amplitude modulation not only makes the energy flowing but also decreases tripling efficiency significantly.
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DOI：
10.1117/12.538481
发表时间：
2004-05
期刊：
Nuclear Instruments and Methods in Physics Research
影响因子：
--
作者：
P. Wegner;J. Auerbach;T. Biesiada;S. Dixit;J. Lawson;J. Menapace;T. Parham;D. C. Swift;P. Whitman;W. Williams
通讯作者：
P. Wegner;J. Auerbach;T. Biesiada;S. Dixit;J. Lawson;J. Menapace;T. Parham;D. C. Swift;P. Whitman;W. Williams
影响因子：
2.5
作者：
R. Craxton
通讯作者：
R. Craxton
影响因子：
1.9
作者：
J. Auerbach;P. Wegner;S. Couture;D. Eimerl;R. Hibbard;D. Milam;M. Norton;P. Whitman;L. Hackel-L.-H
通讯作者：
J. Auerbach;P. Wegner;S. Couture;D. Eimerl;R. Hibbard;D. Milam;M. Norton;P. Whitman;L. Hackel-L.-H
DOI：
10.1117/12.228256
发表时间：
1995-12
期刊：
--
影响因子：
--
作者：
P. Milonni;J. Auerbach;D. Eimerl
通讯作者：
P. Milonni;J. Auerbach;D. Eimerl
DOI：
10.3788/cjl201138.0702001
发表时间：
2011
期刊：
Chinese Journal of Lasers
影响因子：
--
作者：
赵东峰 Zhao Dongfeng;王. W. Li;林尊琪 Lin Zunqi;邵平 Shao Ping;季来林 Ji Lailin;蔡志坚 Cai Zhijian;邬融 Wu Rong;戴亚平 Dai Ya-ping;朱健强 Zhu Jianqiang
通讯作者：
赵东峰 Zhao Dongfeng;王. W. Li;林尊琪 Lin Zunqi;邵平 Shao Ping;季来林 Ji Lailin;蔡志坚 Cai Zhijian;邬融 Wu Rong;戴亚平 Dai Ya-ping;朱健强 Zhu Jianqiang