论文部分内容阅读
研究了磁光薄膜波导中线性啁啾高斯光脉冲与单频连续静磁波共线作用,给出了水平磁化时基于静磁表面波的磁光耦合方程。分别采用解析法和数值法计算了1310 nm和1550 nm两种光波长入射时衍射光的压缩特性,两种求解方法得到的结果一致。计算表明,衍射光脉冲的半峰全宽(FWHM)随相位失配因子的频率变化率和啁啾系数的增大而减小;在给定的计算参数下,与1310 nm波长对应的衍射光脉冲具有较大的峰值强度,但1550 nm波长输入时可以获得更窄的衍射光脉冲,因而1550 nm光脉冲更适于作为磁光脉冲压缩的脉冲源。文章还分析了磁损耗对衍射光脉冲的光强和输出脉宽的影响,对于普通的磁光薄膜,损耗基本上不影响光脉冲压缩效果。
The collinearity between the linear chirped Gaussian optical pulse and the single frequency continuous magnetostatic wave in the magneto-optic thin film waveguide was studied. The magneto-optical coupling equation based on the static magnetic surface wave in the horizontal magnetization was given. The compressive properties of diffracted light at 1310 nm and 1550 nm are calculated respectively by analytical method and numerical method. The results obtained by the two methods are the same. The results show that the FWHM of the diffracted light pulse decreases with the increase of the frequency change rate and the chirp coefficient of the phase mismatch factor. Under the given calculation parameters, the diffracted light corresponding to the 1310 nm wavelength The pulse has a larger peak intensity, but a narrower diffracted light pulse can be obtained at a wavelength of 1550 nm. Therefore, a 1550 nm light pulse is more suitable as a pulse source for magneto-optical pulse compression. The paper also analyzes the influence of magnetic loss on the light intensity and the output pulse width of the diffracted light pulse. For the ordinary magneto-optical thin film, the loss basically does not affect the light pulse compression effect.