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。
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.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2002年第7期595-599,共5页
Chinese Journal of Lasers
基金
广东省自然科学基金资助课题 (批准号 980 35 9)
