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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。