大众科技
大衆科技
대음과기
DAZHONG KEJI
2015年
9期
15-17,23
,共4页
光子晶体光纤%高双折射%高非线性%有限元法
光子晶體光纖%高雙摺射%高非線性%有限元法
광자정체광섬%고쌍절사%고비선성%유한원법
Photonic crystal fiber%large birefringence%high nonlinearity%finite element method
设计了一种新型结构的光子晶体光纤，在其包层和纤芯位置分别引入6个大空气孔和6个小空气孔，采用有限元法研究了该光纤的双折射、有效模面积、非线性系数和色散特性。数值计算结果表明，当光纤包层孔间距为1.0μm时，在1.55μm波长处获得了2.60×10-2的高双折射，在x、y偏振方向分别获得了39.08 W-1·km-1和47.53 W-1·km-1的高非线性系数，且该光纤的零色散波长位于近红外波段。这种高非线性高双折射光子晶体光纤在非线性光学、偏振控制和超连续谱产生方面具有广泛的应用前景。
設計瞭一種新型結構的光子晶體光纖，在其包層和纖芯位置分彆引入6箇大空氣孔和6箇小空氣孔，採用有限元法研究瞭該光纖的雙摺射、有效模麵積、非線性繫數和色散特性。數值計算結果錶明，噹光纖包層孔間距為1.0μm時，在1.55μm波長處穫得瞭2.60×10-2的高雙摺射，在x、y偏振方嚮分彆穫得瞭39.08 W-1·km-1和47.53 W-1·km-1的高非線性繫數，且該光纖的零色散波長位于近紅外波段。這種高非線性高雙摺射光子晶體光纖在非線性光學、偏振控製和超連續譜產生方麵具有廣汎的應用前景。
설계료일충신형결구적광자정체광섬，재기포층화섬심위치분별인입6개대공기공화6개소공기공，채용유한원법연구료해광섬적쌍절사、유효모면적、비선성계수화색산특성。수치계산결과표명，당광섬포층공간거위1.0μm시，재1.55μm파장처획득료2.60×10-2적고쌍절사，재x、y편진방향분별획득료39.08 W-1·km-1화47.53 W-1·km-1적고비선성계수，차해광섬적령색산파장위우근홍외파단。저충고비선성고쌍절사광자정체광섬재비선성광학、편진공제화초련속보산생방면구유엄범적응용전경。
A kind of highly nonlinear and large birefringence photonic crystal fiber is proposed. Six big air holes and six small air holes are added in the cladding and the fiber core respectively. Characteristics such as the birefringence, effective mode area, nonlinear coefficient and dispersion of the fiber are investigated by the finite element method. Simulation results show that the birefringence reaches up to 2.60×10-2 at the wavelength of 1.55μm when the air hole pitch is1.0μm; the nonlinear coefficient is 39.08 W-1·km-1 and 47.53 W-1·km-1 in x and y polarization directions respectively. In addition, this fiber has zero dispersion wavelengths in the infrared band and it could be widely used in the nonlinear optics, polarization control and super-continuum generation.
