Ge_(20)Sb_(15)Se_(65)硫系玻璃光子晶体光纤的中红外色散特性  

Dispersion Properties of Ge_(20)Sb_(15)Se_(65) Chalcogenide Glass Photonic Crystal Fiber for Mid-IR Region

作　　者：刘永兴[1,2,3] 张培晴[1,2,3] 许银生 戴世勋[1,2,3] 王训四 徐铁峰[1,2,3] 聂秋华 

机构地区：[1]宁波大学信息科学与工程学院 [2]材料化学与工程学院 [3]红外材料与器件实验室,浙江宁波315211

出　　处：《光子学报》2012年第5期516-521,共6页Acta Photonica Sinica

基　　金：国家重点基础研究发展计划项目子课题(No.2012CB722703);国家自然科学基金(No.61177087;No.61107047);教育部新世纪优秀人才项目(No.NCET-10-0976);浙江省自然科学基金(No.Q12E020013;No.Q12F050015);浙江省杰出青年基金项目(No.R1101263);浙江省教育厅科技项目(No.y201017523);宁波市新型光电功能材料及器件创新团队项目(No.2009B21007);宁波市自然科学基金(No.2011A610189);宁波大学王宽诚幸福基金资助

摘　　要：硫系玻璃与石英玻璃相比具有高折射率(2.0～3.5)、低声子能量(<350cm-1)、优良的中远红外透过性能(可至25μm)等特性.本文制备了一种在中红外具有优良透过特性的无As环保型Ge20Sb15Se65硫系玻璃材料,以此为基质材料设计了一种三层空气孔结构光子晶体光纤,利用多极法对光纤的中红外色散特性进行了数值模拟,系统研究了结构参量孔径d、孔间距Λ以及d/Λ对其色散特性的影响.分析表明:通过改变包层空气孔直径d或空气孔间距Λ,可灵活的调节光子晶体光纤的零色散波长向短波或长波方向移动.通过优化结构参量发现,当Λ=3μm,d/Λ=0.35附近变化时,可获得3～5μm色散平坦,且色散值小于5ps.nm-1.km-1的光子晶体光纤.Compared with silica glass,chalcogenide glass possesses some unique advantages,such as high refractive index(2.0~3.5),low phonon energy(lower than 350 cm-1),and large infrared transmission window(up to 25 μm).In this paper,a kind of environmental protected Ge20Sb15Se65 chalcogenide glass was prepared,which showed good transmission in IR range.Based on this glass,a photonic crystal fiber with three rings air holes was designed.Multi-pole method was employed to study the dispersion properties of the designed photonic crystal fiber.The relationship between fiber structure parameters(the air diameter d,period Λ and the ratio d/Λ)and dispersion properties was presented.The simulation results showed that the zero dispersion point of photonic crystal fiber can be flexibility tuned to short or long wavelength region by control the fiber structure parameters.Finally,by optimizing the sturcure parameters,the dispersion flat photonic crystal fiber through of 3~5 μm was obtained,with the dispersion value less than 5 ps·nm-1·km-1.

关 键 词：光子晶体光纤 硫系玻璃 中红外色散 多极法 

分 类 号：TN253[电子电信—物理电子学]