熔锥型保偏光纤耦合器分光比的偏振依赖研究

实验研究了熔锥型保偏光纤耦合器分光比随入射单色线偏振光偏振方向的旋转所呈现的周期性,验证了保偏光纤耦合器分光比的偏振依赖特性.借鉴已成熟的单模光纤耦合器的倏逝场耦合模理论,对这一偏振依赖分光比的周期性规律提出了一种理论解释.在实验结果的规律性基础上,经验拟合出了分光比与单色线偏振光输入偏振角的函数关系.

Polarization Dependence Couple Ratio of Fused Polarization Maintaining Optical Fiber Couplers

The polarization dependence couple ratio of fused polarization maintaining optical fiber couplers is verified experimentally.The couple-mode theory of fused single-mode-fiber couple is employed to calculate the couple coefficient of fused polarization maintaining optical fiber couplers.It is shown that the couple ratio of fast axis and slow axis could be use to calculate the couple ratio of arbitrary angles under a simple functional relation,which is found through the experimental data for launching a monochromatic linear polarized light in special angles.Furthermore,that function could be interpreted as disassembling orthogonally of the amplitude vector for the electric field.