| 束变换环孔激光谐振腔的环束场传输差分计算 |
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| 引用本文： | 刘文广,陆启生,刘泽金.束变换环孔激光谐振腔的环束场传输差分计算[J].强激光与粒子束,2004,16(7):835-839. |
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| 作者姓名： | 刘文广 陆启生 刘泽金 |
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| 作者单位： | 国防科学技术大学 理学院，湖南 长沙 410073 |
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| 基金项目： | 国家863计划项目资助课题 |
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| 摘 要： | 通过使用新的坐标变量和光场的表达形式，推导了新坐标系下环束场传输的偏微分方程，给出了相应差分方程的截断误差和稳定性条件，使得环束场传输计算速度大幅提高；使用二阶精度的Crank-Nicolso差分方法对束变换环孔激光谐振腔的环束场传输进行了计算，并与W.D.Murphy和M.L.Bernabe所给M-B积分近似方法的计算结果进行了比较，证实了该方法无论计算速度和精度都优于M-B积分近似方法。
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| 关 键 词： | 高能激光 束变换环孔腔 环形增益介质 有限差分方法 |
| 文章编号： | 1001-4322(2004)07-0835-05 |
| 收稿时间： | 2003/11/14 |
| 修稿时间： | 2003年11月14 |
Calculation of annular beam propagation in beam-converting annular resonator with a fast finite difference method |
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| LIU Wen-guang,LU Qi-sheng,LIU Ze-jin.Calculation of annular beam propagation in beam-converting annular resonator with a fast finite difference method[J].High Power Laser and Particle Beams,2004,16(7):835-839. |
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| Authors: | LIU Wen-guang LU Qi-sheng LIU Ze-jin |
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| Institution: | Science College, National University of Defence Technology, Changsha 410073, China |
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| Abstract: | Beam-converting annular resonator(BCAR) possesses outstanding characteristics of high extraction efficiency and near-diffractive beam quality.But the numerical simulation of BCAR is a hard work,for the thin annular beam propagating calculation will cost much computer work with conventional methods.In this paper a clever finite difference method based on coordinates transform is presented.This method can largely reduce the time for calculating annular beam propagation,it also has higher precision than W.D.Murphy's approximation method does. |
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| Keywords: | High energy laser Beam-converting annular resonator Annular gain medium Finite difference method |
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