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    • 2. 发明申请
    • PHOTONIC CRYSTAL FIBRE
    • 光电晶体纤维
    • WO2004019092A1
    • 2004-03-04
    • PCT/DK2003/000550
    • 2003-08-19
    • CRYSTAL FIBRE A/SMORTENSEN, Niels, AsgerBROENG, JesPETERSSON, AndersFOLKENBERG, Jacob, RiisVIENNE, Guillaume
    • MORTENSEN, Niels, AsgerBROENG, JesPETERSSON, AndersFOLKENBERG, Jacob, RiisVIENNE, Guillaume
    • G02B6/16
    • G02B6/02323G02B6/02019G02B6/02338G02B6/02347G02B6/02352G02B6/02357G02B6/02361G02B6/02371G02B6/02385
    • The present invention provides an improved large mode area, single mode or few mode optical fibre that is robust towards loss mechanisms such as bending losses and coupling losses. The optical fiber is aimed for use in transmission of light at at least one optical wavelength, λ. The optical fibre (10) has a longitudinal direction and a cross-section perpendicular thereto. The optical fiber comprises a core region (11) and a micro-structured cladding region. The cladding region surrounds the core region and it comprises micro-structured cladding features (12) that are arranged in a background cladding material (13). A plurality of the micro-structured cladding features has substantially similar size d - typical- ly the cladding features are circular in cross-section and d is equal to the diameter of the cladding features. At least a number of the cladding features are arranged proximal to said core region at a center-to-center cladding feature spacing, h, larger than 3 times λ. The core region is surrounded by more than six innermost cladding elements having a ratio d/h less than 0.45.
    • 本发明提供了一种改进的大模式区域,单模或多模光纤,其对诸如弯曲损耗和耦合损耗的损耗机制是鲁棒的。 该光纤被用于在至少一个光学波长λ的透射中使用。 光纤(10)具有与其垂直的纵向方向和横截面。 光纤包括芯区(11)和微结构的包层区。 包层区域围绕芯区域,并且其包括布置在背景包层材料(13)中的微结构的覆层特征(12)。 多个微结构的包层特征具有基本相似的尺寸d-典型的是,包层特征在横截面上是圆形的,d等于包层特征的直径。 至少多个包层特征被布置在所述纤芯区域的近中心包围特征间距h,大于λ的3倍。 核心区域由比d / h小于0.45的多于六个最内层的包层元件包围。
    • 3. 发明申请
    • IMPROVED ACTIVE OPTICAL FIBERS WITH WAVELENGTH-SELECTIVE FILTERING MECHANISM, METHOD OF PRODUCTION AND THEIR USE
    • 改进的具有波长选择性滤波机制的活性光纤,生产方法及其使用
    • WO2007057024A2
    • 2007-05-24
    • PCT/DK2006/000646
    • 2006-11-20
    • CRYSTAL FIBRE A/SPETERSSON, AndersBROENG, JesKRISTIANSEN, René Engel
    • PETERSSON, AndersBROENG, JesKRISTIANSEN, René Engel
    • G02B6/02323G02B6/02338G02B6/02347G02B6/02357G02B6/02366G02B6/0238H01S3/06708H01S2301/02
    • The invention relates to optical fibers for use in optical amplification of light, such as in optical fiber amplifiers and lasers and for use in delivery of high power light, in particular to a scheme for reducing amplified spontaneous emission at undesired wavelengths. The invention further relates to articles, methods and use. An object of the invention is achieved by a micro- structured optical fiber, which is adapted to guide light by the photonic bandgap effect and to have one or more pass bands and at least one stop- band over a wavelength range from λ stop1 to λ stop2- In an aspect of the invention, the at least one stop-band provides filter functions that suppress nonlinear effects. In another aspect, the core region is actively doped, and the active material has an emission spectrum with a higher value of the emission cross section σ E at a wavelength λ ASE between λ stop1 and λ stop2 than outside said wavelength range such that amplified spontaneous emission and lasing within the wavelength range from λ stop1 to λ stop2 is reduced. In still another aspect, the optical fiber exhibits photonic bandgaps at different wavelength ranges in different radial directions of a cross section of the optical fiber.
    • 本发明涉及用于光的光放大的光纤,例如在光纤放大器和激光器中并用于传送高功率光,特别是涉及用于减少不需要的波长的放大的自发发射的方案。 本发明还涉及物品,方法和用途。 本发明的目的是通过微结构光纤来实现的,该光纤适用于通过光子带隙效应来引导光,并且在波长范围内具有一个或多个通带和至少一个阻带。 stop1至 stop2-在本发明的一个方面,至少一个阻带提供抑制非线性效应的滤波器功能。 另一方面,核心区域是有源掺杂的,并且活性材料具有发射截面的发射光谱,其在波长λSUP以下的ASE之间的 stop1和 stop2比在所述波长范围之外,使得在从停止1到...的波长范围内的放大的自发发射和激光 stop2减少。 在另一方面,光纤在光纤的横截面的不同径向方向上表现出不同波长范围的光子带隙。
    • 4. 发明申请
    • IMPROVEMENTS RELATING TO PHOTONIC CRYSTAL FIBRES
    • 关于光子晶体纤维的改进
    • WO2004053550A1
    • 2004-06-24
    • PCT/DK2003/000843
    • 2003-12-09
    • CRYSTAL FIBRE A/SBROENG, JesPETERSSON, Anders
    • BROENG, JesPETERSSON, Anders
    • G02B6/20
    • G02B6/023G02B6/02333G02B6/02338G02B6/02347G02B6/02357G02B6/02366G02B6/02371
    • A multi-mode optical fibre for guiding light, the optical fibre having an axial direction and a cross section perpendicular to said axial direction, the optical fibre comprising (a) a core region (10, 70, 74) for propagating the light to be guided in the longitudinal direction of the optical fibre; said core region having a minimum dimension (ρ) equal to or larger than 30 µm; (b) an inner cladding region, said inner cladding region surrounding said core region and comprising three or more voids or holes separated by a minimum distance (b) in the range from 2m to 10m, and being arranged in an inner cladding background material with refractive index n 1 ; and (c) an outer cladding region with an outer cladding background material with refractive index n2, and a thickness (t), said thickness being equal to or larger than 10µm; said core region and said outer cladding region being connected by said inner cladding material; an optical fibre communication system or high power laser transmission system comprising such as fiber; a preform and method for its production. Further, an optical fiber for guiding light comprising a core region and a cladding region; said core region, and/or cladding region comprising ring-shaped regions or elements having refractive indices different from that of the background materials of said core region, and/or said cladding region.
    • 一种用于引导光的多模光纤,所述光纤具有轴向和与所述轴向方向垂直的横截面,所述光纤包括(a)用于传播光的芯区域(10,70,74) 沿光纤的纵向引导; 所述芯区域具有等于或大于30μm的最小尺寸(rho); (b)内包层区域,所述内包层区域围绕所述纤芯区域,并且包括三个或更多个在最小距离(b)之间分隔的距离为2μm至10μm的空隙或孔,并且布置在内包层背景材料中, 折射率n1; 和(c)具有折射率n2的外包层背景材料的外包层区域,以及厚度(t),所述厚度等于或大于10μm; 所述芯区域和所述外包层区域由所述内包层材料连接; 光纤通信系统或包括诸如光纤的大功率激光传输系统; 预制件和其生产方法。 此外,用于引导包括芯区域和包层区域的光的光纤; 和/或包含区域的包层区域,和/或包含具有与所述芯区域的背景材料的折射率不同的折射率的环形区域或/或所述包层区域的包层区域。