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    • 33. 发明申请
    • Method and apparatus for the evaluation of polarization mode dispersion in optical fibers
    • 用于评估光纤中偏振模色散的方法和装置
    • US20070189656A1
    • 2007-08-16
    • US10572203
    • 2004-09-14
    • Davide SarchiMartino TravagninAlexis Debut
    • Davide SarchiMartino TravagninAlexis Debut
    • G02B6/00
    • G01M11/336G01M11/088G01M11/331G01M11/335H04B10/2569
    • A method of evaluating the Polarization Mode Dispersion (PMD) of an optical fiber by arranging the optical fiber at substantially zero tension on a surface, propagating prescribed evaluation optical signals along the optical fiber, measuring fiber Differential Group Delay (DGD) values in response to the evaluation optical signals, repeating at least once the acts of propagating and measuring, each time preliminarily inducing a change in a mode coupling of the fiber, and determining the fiber PMD on the basis of a calculated DGD average value. Changes in the polarization mode coupling of the fiber are induced by, moving at least a section of the fiber substantially orthogonally to the surface. An improved PMD evaluation apparatus includes a fiber arrangement surface adapted to have a fiber under test arranged thereon at substantially zero tension, and, operatively associated with the fiber arrangement surface, a fiber moving device activatable for moving the at least a section of the fiber substantially orthogonally to the fiber arrangement surface.
    • 一种通过将光纤布置在表面上基本为零张力的光纤来评估光纤的偏振模色散(PMD)的方法,沿着光纤传播规定的评估光信号,响应于光纤的差分组延迟(DGD)值 评估光信号,每次重复至少一次传播和测量的动作,每次预先引起光纤的模式耦合的改变,并且基于所计算的DGD平均值来确定光纤PMD。 纤维的偏振模式耦合的变化是通过将纤维的至少一部分基本上垂直于表面移动而引起的。 一种改进的PMD评估装置包括纤维布置表面,该纤维布置表面适于具有基本上零张力的被测试纤维,并且与纤维布置表面可操作地相关联;纤维移动装置,其可激活以基本上移动纤维的至少一部分 与纤维布置表面正交。
    • 34. 发明授权
    • Method for guiding an electromagnetic radiation, in particular in an integrated optical device
    • 用于引导电磁辐射的方法,特别是在集成的光学装置中
    • US07233729B2
    • 2007-06-19
    • US10506658
    • 2002-03-06
    • Marco RomagnoliMaurizio TormenCamilla Bonati
    • Marco RomagnoliMaurizio TormenCamilla Bonati
    • G02B6/26G02B6/12
    • B82Y20/00G02B6/1225G02B6/125
    • A method for guiding electromagnetic radiation by providing a photonic crystal made of a bulk material with a predetermined refractive index and having a periodic array of holes with predetermined radius, and feeding to that region an electromagnetic radiation having a wavelength in the fundamental photonic band and so related to the refractive index of the bulk material, to the radius of the holes and to the period of the array that, starting from an isotropic distribution of the wave vectors within a first angular range that is twice the angular extension of the first irreducible Brillouin zone of the photonic crystal, the corresponding group velocity vectors are rearranged as concerns direction and module so that at least 50% of them become directed within a second angular range that is about one-third of the first angular range and the width at half-maximum of the distribution of the modules of the vectors is lower than about two-thirds of the second angular range.
    • 一种通过提供由具有预定折射率的本体材料制成的具有预定半径的孔的周期阵列的光子晶体来引导电磁辐射的方法,并向该区域馈送具有基本光子带中的波长的电磁辐射 与体积材料的折射率相关,到孔的半径和阵列的周期,其从波矢的各向同性分布开始,第一角度范围是第一不可约布里渊的角度延伸的两倍 光子晶体的区域,相应的组速度矢量被重新排列为关于方向和模块,使得它们中的至少50%变为在第一角度范围的约三分之一的第二角度范围内, 向量的模块的分布的最大值低于第二角度范围的约三分之二。