摘要
为了在光子晶体光纤中产生高双折射,设计了一种特殊结构的光子晶体光纤,纤芯区域设计为菱形,包层则采用六边形排列的圆形空气孔。采用全矢量有限元法进行计算,理论分析了这种光纤的双折射、约束损耗、色散、非线性系数和模场面积等传输特性,并通过了仿真实验验证。结果表明,在波长为1.55μm时,双折射高达0.0524,x偏振方向上的约束损耗仅为2.49×10^(-6)dB/m,非线性系数可达52.512 W^(-1)·km^(-1),模场面积为2.4703μm^(2);在0.95μm~1.85μm波长范围内,x偏振方向上的色散为(0.775±2.645)×10^(-12)ps/(nm·km)。此高双折射光子晶体光纤在光通信、光传感等领域具有良好的应用前景。
In order to generate high birefringence in photonic crystal fiber(PCF),a special structure of PCF was designed,the core area was designed as diamond shape,and the cladding was arranged with hexagonal circular air holes.The transmission characteristics of the optical fiber,such as birefringence,confinement loss,dispersion,nonlinear coefficient and mode field area,were analyzed theoretically.The full-vector finite element method was used to calculate the birefringence as high as 0.0524 at the wavelength of 1.55μm,and the confinement loss in the x-polarization direction was only 2.49×10^(−6)dB/m.The nonlinear coefficient can reach 52.512 W^(−1)·km^(−1),and the mode field area is 2.4703μm^(2).In the wavelength range of 0.95μm~1.85μm,the dispersion in the x-polarization direction is(0.775±2.645)×10^(−12)ps/(nm·km).This high birefringent photonic crystal fiber has a good application prospect in optical communication,optical sensing and other fields.
作者
孙宏森
靳清清
岳京歌
刘凯
蒲俊宇
闫煜鹏
宋锡策
余先伦
SUN Hongsen;JIN Qingqing;YUE Jingge;LIU Kai;PU Junyu;YAN Yupeng;SONG Xice;YU Xianlun(School of Electronic and Information Engineering,Chongqing Three Gorges University,Chongqing 404020,China)
出处
《激光技术》
北大核心
2025年第4期551-555,共5页
Laser Technology
基金
国家重点研发计划资助项目(2021YFB3901405)
国家自然科学基金资助项目(U2030116)
三峡库区地质环境监测与灾害预警重庆市重点实验室开放基金资助项目(YB2020C0301)。
关键词
光纤光学
光子晶体光纤
菱形纤芯
高双折射
fiber optics
photonic crystal fibers
diamond-shaped core
high birefringence
