The dispersion relation and the optical transmittance of a two-dimensional photonic crystal composed of the hexagonal array of cylindrical air holes fabricated in a dielectric slab were analyzed by group theory and the numerical calculation based

光孤子传输特性模拟 在光纤通信中，光脉冲信号在光纤中传输的过程中会受到色散、损耗和非线性等作用的影响而不断地发生演化和畸变。脉冲演化的规律遵循非线性薛定谔方程（NLSE）。由于NSLE 在一般情况下无法求得它的解析解，因此通常需采要用数值方法来求解，最终归结于求解归一化的NLSE。本文使用了分步傅里叶方法对归一化NLSE 进行了求解，并模拟了输入为一到三阶双曲正割光脉冲条件下光脉冲传输演变情况。-soliton In optical fiber communications, the optic

MRTD算法的2阶和三阶数值色散分析，对需要进一步研究MRTD算法者有进一步的参考价值-2 MRTD algorithms and third-order numerical dispersion analysis, MRTD algorithm require further study by the reference value for further

采用FDTD算法仿真矩型脊波导TM模色散曲线-The finite difference time domain Maxwell equations in the field of time and space differencing. Leapfrog space in the field of electric and magnetic fields alternate calculation, updated by the time field to mimic the changes

频散曲线求解，利用matlab进行lamb的求解，结果与数值分析方法相比，误差较小，对试验结果具有重要参考价值。通过仿真试验，结果结果比较好。(To solve the dispersion curve, using o solve the dispersion curve, using matlab to solve lamb, the results compared with the numerical analysis method, the error is small, the te