| 声光效应拉曼-内斯方程矩阵级数解法及声光调制器优化设计 |
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| 引用本文： | 黎永航,蔡懿,郑国梁,林旭斌,佘卫龙.声光效应拉曼-内斯方程矩阵级数解法及声光调制器优化设计[J].中国激光,2002,29(7):595-599. |
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| 作者姓名： | 黎永航 蔡懿 郑国梁 林旭斌 佘卫龙 |
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| 作者单位： | 中山大学超快速激光光谱学国家重点实验室和中山大学物理系,广州,510275 |
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| 基金项目： | 广东省自然科学基金资助课题 (批准号 980 35 9) |
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| 摘 要： | 提出一种求解正常声光相互作用拉曼 内斯 (Raman Nath)方程的矩阵级数解法 ,该解法直观方便且具有普遍性。计算结果表明 ,对Q =4 1π ,Bragg衍射的效率只有 97 5 % ;对非对称入射 ,以往的Raman Nath近似解误差较大 ;指出提高Bragg衍射效率的有效途径在于提高声光频率比并给出计算声光器件最优长度的计算公式。
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| 关 键 词： | 声光效应 衍射效率 拉曼内斯方程 矩阵级数解法 |
| 收稿时间： | 2001/4/23 |
Matrix Series Method of the Raman-Nath Equation of Ultrasonic Light Diffraction and Its Application to the Optimum Design of Acousto-optics Modulator |
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| LI Yong hang,CAI Yi,ZHENG Guo liang,LIN Xu bin,SHE Wei long.Matrix Series Method of the Raman-Nath Equation of Ultrasonic Light Diffraction and Its Application to the Optimum Design of Acousto-optics Modulator[J].Chinese Journal of Lasers,2002,29(7):595-599. |
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| Authors: | LI Yong hang CAI Yi ZHENG Guo liang LIN Xu bin SHE Wei long |
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| Abstract: | A universal and convenient matrix series method to solve the Raman Nath equation of normal ultrasonic light diffraction is presented. The results show that the diffraction efficiency for Bragg approach is only 97.5% at Q=4.1π, and that for asymmetry incidence, there is large error in previous Raman Nath approach. The formula of the optimum length of the acousto optics modulator is given. Increasing the ratio of acoustical frequency to optical frequency is a effective way to improve the diffraction efficiency. |
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| Keywords: | ultrasonic light diffraction diffraction efficiency Raman Nath equation matrix series method |
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