双折射光子晶体光纤中不同偏振角导致的脉冲俘获

基于耦合非线性薛定谔方程,研究了双折射光子晶体光纤中单个光脉冲的非线性传输.当输入脉冲位于反常色散区且偏振角偏离光纤快轴0°和90°时可观察到脉冲俘获现象,脉冲俘获效率在偏振角为45°时最小,当脉冲的入射角度互余时,小角度的脉冲俘获效率更高.此外,增加输入脉冲功率俘获脉冲能够获得更大的频谱偏移.

Pulse Trapping Resulting from Different Polarized Angles in Birefringent Photonic Crystal Fibers

The nonlinear propagation of an ultrashort optical pulse in a birefringent photonic crystal fiber was investigated numerically using the coupled nonlinear Schro dnger equations.It was found that the phenomenon of pulse trapping occurred when the polarized angle was deviated from 0 degree and 90 degrees of the fast axis.A minimum trapping efficiency was obtained when the polarized angle was at 45 degrees.As the two input orientation angles were complementary angles,the smaller angle obtained higher trapping efficiency.As the power of the input pulse was increased,the larger wavelength shift of the trapped pulse was obtained.