【摘要】 利用时域有限差分法针对满足带耦合腔PCFS条件的Maxwell方程组进行电磁场三维矢量变换,来建立关于入射光在光子晶体光纤传播物理数值模型。通过数值仿真表明:在波导色散作用下,当空气间隙增大,其TE波在直角坐标系中三维矢量数值大小与网格步长递增呈正比变化,且瞬态截面分裂速度减缓且数目递减、体积变大;反之,当空气孔间隙减小,其TM波三维矢量随着传输网格步长递增,瞬态截面分裂呈细丝状且数目递增、体积变小。同时,随着角频率w0增大,磁场x,y方向中心强度随时间网格呈对称式变化且峰值强度逐渐递增;同时在L+Nd=150(N=0,1,2;l>0)处存在拐点;在电场z方向,振幅抖动愈加频繁且峰值连续上涨,相位峰值逐渐递减且脉宽呈压缩变化。更多还原

【Abstract】 The finite difference time-domain electromagnetic method for three-dimensional vector transformation to meet with a coupled-cavity PCFS conditions Maxwell equations to build on the incident light propagation in photonic crystal fibers physics numerical models. Numerical simulations show that: in the waveguide dispersion effect,when the air gap increases,the TE wave in the Cartesian coordinate system and the grid size threedimensional vector value is proportional to the change in increments,and the transient section split speed decreases,the volume change large; on the contrary,when the air hole gap decreases,its three-dimensional vector with TM wave transmission grid in increments,transient section was split filaments,smaller size. Meanwhile,with the angular frequency w0 increases,the magnetic field direction of the center of intensity with time change and the grid was symmetrical peak intensity gradually increasing; while in L + Nd = 150( N = 0,1,2; L >0) exist at inflection point; the direction of the electric field amplitude peak jitter increasingly frequent and continuous rise,gradually decreasing the peak phase and pulse compression was changed.更多还原