CAJ | 학술논문

提出了一种在大波长范围内具有高双折射和小有效模场面积的光子晶体光纤.采用全矢量有限元法分析了该光纤的模场分布、有效模场面积、有效折射率以及偏振保持等特性.分析结果表明,该光纤的双折射很容易达到10-3量级,其双折射值高于传统六角芯型保偏光子晶体光纤.此外,该光纤的有效模场面积比传统六角芯型保偏光子晶体光纤的小,这降低了光纤的损耗和弯曲损耗.适合应用于偏振特性及弯曲不敏感性要求都较高的实际光纤传感系统,例如光纤陀螺.
제출료일충재대파장범위내구유고쌍절사화소유효모장면적적광자정체광섬.채용전시량유한원법분석료해광섬적모장분포、유효모장면적、유효절사솔이급편진보지등특성.분석결과표명,해광섬적쌍절사흔용역체도10-3량급,기쌍절사치고우전통륙각심형보편광자정체광섬.차외,해광섬적유효모장면적비전통륙각심형보편광자정체광섬적소,저강저료광섬적손모화만곡손모.괄합응용우편진특성급만곡불민감성요구도교고적실제광섬전감계통,례여광섬타라.
A novel highly birefringent photonic crystal fiber structure with five air-holes in the internal layer was proposed and analyzed by using a full-vector finite method (FEM). The effective refractive indices of two orthogonal polarization modes and the birefringence of the new photonic crystal fibers(PCF) were investigated. The relation curves between the birefringence of this PCF and the wavelength of the input light and the radius of larger air holes were given respectively. The numerical results show that, the birefringence of the new polarization maintaining photonic crystal fiber can easily achieve the order of 10-3, which is at least one order of magnitude higher than that of standard birefringent ones. It is shown that it may exhibit birefringence as high as 6.5 10?? at wavelength of 1550 nm, or even higher. It can well satisfy the application 3 of real optical sensing systems which need high polarization and reliability, e.g. fiber optic gyroscope.