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A novel bend-resistant large-mode-area photonic crystal fiber
新型抗弯曲大模场面积光子晶体光纤

Lou Shu-Qin,Lu Wen-Liang,Wang Xin,
娄淑琴
,鹿文亮,王鑫

物理学报 , 2013,
Abstract: 研制出一种新型抗弯曲大模场面积石英光子晶体光纤. 利用光子晶体光纤结构设计的灵活性, 通过规划缺陷的位置及空气孔的尺寸, 实现了大模场面积单模及低弯曲损耗特性.应用建立的实际光子晶体光纤特性分析模型, 研究了研制光纤的模式特性和弯曲特性, 在波长1064 nm处, 平直状态下光纤的模场面积可以达到2812 μm2, 基模限制损耗为0.00024 dB/m, 高阶模限制损耗高于1.248 dB/m. 基模和高阶模之间的高传输损耗差, 保证了在获得大模场面积的同时实现单模传输. 弯曲半径和弯曲方向角所带来弯曲损耗变化的研究结果显示, 即使在弯曲半径小到5 cm时, 弯曲损耗也在10-3 dB/m量级以下, 而且在弯曲半径为30 cm时光纤可承受的弯曲方向角范围扩展至-60°–60°. 研制的光纤具有良好的低弯曲损耗特性, 可有效解决非对称结构所带来的光纤弯曲特性对弯曲方向角敏感的问题. 该光纤在高功率光纤激光器、放大器及高功率传输等技术领域具有重要的应用价值.
低展弦比透平叶片弯曲方法研究
王仲奇,韩万今,徐文远
工程热物理学报 , 1995,
Abstract:
估算SOI单模背形弯曲波导最小弯曲半径的简单方法
魏红振,史伟
红外与毫米波学报 , 2001,
Abstract: 采用有效折射率方法计算了SOI弯曲波导由于辐射损耗引起模式截止的最小弯曲半径,得到了一个估算弯曲波导的最小弯曲半径的解析表达式。
估算SOI单模背形弯曲波导最小弯曲半径的简单方法
红外与毫米波学报 , 2001,
Abstract: 采用有效折射率方法计算了SOI弯曲波导由于辐射损耗引起模式截止的最小弯曲半径,得到了一个估算弯曲波导的最小弯曲半径的解析表达式。
SOI波导弯曲损耗改善方法的研究
红外与毫米波学报 , 2005,
Abstract: 采用有效折射率方法EIM(EffectiveIndexMethod)和二维束传播算法(2D-BPM)对SOI(Sillcon-on—insulator)波导弯曲损耗的改善方法进行了模拟分析.模拟发现,在波导连接处引入偏移量和在波导外侧刻槽等两种不同方法都能有效减小弯曲损耗,并且后者的效果更明显.同时通过实验获得了验证.对R=16mm、横向位移为70μm的弯曲波导,通过刻槽方法将插入损耗降低了5dB,基本消除了弯曲所带来的附加损耗.
The Relationship of the Radius to the Loss in Bending Waveguide
波导弯曲半径与弯曲损耗的关系

( Applied Physics Dept,South China Univ of Tech,Guangzhou,China ( The Research Institute of Quantum Electronics,South China Normal Univ,Guangzhou,China,
张小康
,廖常俊,刘颂豪

光子学报 , 2004,
Abstract: An experimental formula of bending loss is suggested on the basis of conformal transformation and normalized approach used in analysis of curved optical waveguides. Bending loss as a function of the bending radius for four materials in common use are obtained by the experimental formula and the results from these curves were compared with the data reported in the manufacture of AWG. It proved that the experimental formula may be some useful in selecting minimum bend radius of a waveguide according to the request of bending loss when designing AWG.
LOSS OF GEODESIC LENSES
短程透镜的损耗

Lu Ping,Fan Junqing,
鲁平
,范俊清

光子学报 , 1996,
Abstract: In the paper,various factors of the loss causing geodesic lenses are described,the loss of geodesic lenses have been successfully reduced by way of the optimal curvature radius of the rim at the edge and of surface polish,the measured values of geodesic lenses loss are given.
Experimental Investigation on the Bending Loss Properties of Photonic Crystal Fibers
光子晶体光纤弯曲损耗特性研究

GUO Xia-rui,YANG De-xing,ZHAO Jian-lin,YANG Qing,DU Xu-rong,
郭夏锐
,杨德兴,赵建林,杨青,杜旭荣

光子学报 , 2007,
Abstract: 对光子晶体光纤的损耗特性进行了分析,并在实验上对两种典型的光子带隙型和全内反射型光子晶体光纤进行了研究.分别对两种不同结构的光子晶体光纤在弯曲半径2~15mm范围内的损耗进行了测量.与传统光纤损耗实验结果的对比表明,两种光子晶体光纤的弯曲损耗均不明显,具有很强的抗弯曲损耗能力.实验也证实了光子晶体光纤弯曲损耗存在临界弯曲半径,在大于临界半径的情况下,几乎没有弯曲损耗.从结构上分析并证明光子晶体光纤弯曲损耗随填充比(d/Λ)的增加而减小,填充比越高弯曲损耗越小.
RESEARCH ON IMPROVED METHODS OF REDUCTION OF BEND LOSS OF SILICON-ON-INSULATOR WAVEGUIDES
SOI波导弯曲损耗改善方法的研究

CHEN Yuan-Yuan,YU Jin-Zhong,CHEN Shao-Wu,FAN Zhong-Chao,
陈媛媛
,余金中,陈少武,樊中朝

红外与毫米波学报 , 2005,
Abstract: Improved methods of reduction of bend loss of silicon-on-insulator waveguides were simulated and analyzed by means of effective index method (EIM) and two dimensional beam propagation method (2D-BPM). The simulation results indicate that two different methods, one of which are introducing an offset at the junction of two waveguides and the other is etching groove at the outside of bend waveguide, can decrease bend loss. And the later one is more effective. Meanwhile, experiments validate them. By etching groove, the insertion loss of bend waveguide of R=16mm, transverse displacement 70μm was decreased 5dB. And its bend loss was almost eliminated.
Design of all-solid octagon photonic crystal fiber with large mode area
全固态八边形大模场光子晶体光纤的设计

Guo Yan-Yan,Hou Lan-Tian,
郭艳艳
,侯蓝田

物理学报 , 2010,
Abstract: 提出一种新型的全固态八边形大模场低损耗的掺镱石英光子晶体光纤,利用多极法对光纤的结构和特性进行了模拟.这种结构的光子晶体光纤空气孔由掺有少量氧化硼的石英棒代替,简化了制备过程,提高了光纤的热损伤阈值.在波长为1.064 μm处,光纤的模场面积可达2000 μm2,还可实现单模传输,而且其弯曲损耗很小,当弯曲半径为5 cm时弯曲损耗小于0.5 dB/m.这种光纤对光纤激光器和光纤放大器的发展有重要意义.
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