基于磁光耦合的法拉第效应机理分析

发布时间：2018-04-09 03:08

本文选题：物理光学　切入点：磁光调制　出处：《激光与光电子学进展》2017年06期

【摘要】：为进一步阐明基于法拉第效应的磁光调制过程中各因素之间的相互影响机理,引入了多场耦合理论,结合麦克斯韦方程并综合考虑磁场作用下物质结构内部参数的变化,构建了偏振光在磁光耦合条件下的传输模型,得到了法拉第旋转角的最终表达式,并利用基于有限元的多场耦合软件进行耦合模拟和数值求解。仿真结果表明,在10A电流激励螺线管产生0.0373T的磁感应强度下,入射波长为1064nm的偏振光通过长度为3cm的铽镓石榴石(TGG)磁光玻璃后,发生了2.245°的偏转,在同等条件下,通过MR3-2磁光玻璃时发生的偏转角为2.023°。通过对比仿真结果与理论计算结果,验证了磁光耦合机理模型的正确性。
[Abstract]:In order to further elucidate the interaction mechanism of various factors in the magneto-optic modulation process based on Faraday effect, the multi-field coupling theory is introduced, and the variation of the internal parameters of the material structure under the action of the magnetic field is considered in combination with Maxwell equation.The transmission model of polarized light under magneto-optic coupling condition is constructed, and the final expression of Faraday rotation angle is obtained, and the coupling simulation and numerical solution are carried out by using multi-field coupling software based on finite element method.The simulation results show that under the magnetic induction intensity of 0.0373T generated by 10A current-excited solenoid, the polarized light with incident wavelength of 1064nm passes through the terbium gallium garnet magneto-optic glass with length of 3cm, and a deflection of 2.245 掳occurs under the same conditions.The deflection angle of MR3-2 magneto-optic glass is 2.023 掳.The correctness of the magneto-optic coupling mechanism model is verified by comparing the simulation results with the theoretical calculation results.
【作者单位】：火箭军工程大学兵器发射理论与技术国家重点学科实验室;光电控制技术重点实验室;
【基金】：国家自然科学基金(61505254) 光电控制技术重点实验室和航空科学基金联合资助(201551U8088)
【分类号】：O436.4

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