The bending characteristics of dual-hole polarization maintaining photonic crystal fiber(PM-PCF) are demonstrated in this paper. The modal interference is induced by the LP_(01) mode and LP_(11) mode propagating in a ...The bending characteristics of dual-hole polarization maintaining photonic crystal fiber(PM-PCF) are demonstrated in this paper. The modal interference is induced by the LP_(01) mode and LP_(11) mode propagating in a single PM-PCF with the same polarization direction. Simulation results demonstrate that the bending radius induces the phase difference between LP_(01) mode and LP_(11) mode, which leads to the change of light interference intensity on the fiber output facet. The relationship between bending radius and normalized interference intensity with three different bending angles is discussed, where the bending angle is defined as the angle between hole axis and the x axis. The bending sensitivity is obtained to be about-188.78/m around the bending radius of 1.5 cm with the bending angle of 90°. The bending characteristics can contribute for online bending detection in widespread areas.展开更多
基金supported by the National Natural Science Foundation of China(No.61475133)the Hebei Provincial Natural Science Foundation(No.F2015203270)+3 种基金the Yanshan University Doctor Foundation(No.B872)the Yanshan University Youth Foundation(No.14LGB015)the College Youth Talent Project of Hebei Province(No.BJ2014057)the Hebei Educational Committee Natural Science Youth Fund(No.QN2014034)
文摘The bending characteristics of dual-hole polarization maintaining photonic crystal fiber(PM-PCF) are demonstrated in this paper. The modal interference is induced by the LP_(01) mode and LP_(11) mode propagating in a single PM-PCF with the same polarization direction. Simulation results demonstrate that the bending radius induces the phase difference between LP_(01) mode and LP_(11) mode, which leads to the change of light interference intensity on the fiber output facet. The relationship between bending radius and normalized interference intensity with three different bending angles is discussed, where the bending angle is defined as the angle between hole axis and the x axis. The bending sensitivity is obtained to be about-188.78/m around the bending radius of 1.5 cm with the bending angle of 90°. The bending characteristics can contribute for online bending detection in widespread areas.
