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    • 1. 发明申请
    • OPTICAL COUPLER DEVICES, METHODS OF THEIR PRODUCTION AND USE
    • 光耦合器装置,其生产和使用方法
    • WO2005091029A9
    • 2005-10-27
    • PCT/DK2005000192
    • 2005-03-21
    • CRYSTAL FIBRE ASNIELSEN MARTIN DYBENDALSKOVGAARD PETER M WBROENG JESVIENNE GUILLAUME
    • NIELSEN MARTIN DYBENDALSKOVGAARD PETER M WBROENG JESVIENNE GUILLAUME
    • G02B6/02G02B6/036G02B6/26G02B6/28H01S3/067G02B6/16G02B6/22
    • G02B6/262G02B6/02004G02B6/02333G02B6/02338G02B6/02357G02B6/02366G02B6/02376G02B6/03627G02B6/03644G02B6/03688G02B6/2835H01S3/06708H01S3/06729H01S3/06741H01S3/06745H01S3/094007H01S3/094019
    • The present invention relates in general to coupling of light from one or more input waveguides to an output waveguide or output section of a waveguide having other physical dimensions and/or optical properties than the input waveguide or waveguides. The invention relates to an optical component in the form of a photonic crystal fibre for coupling light from one component/system with a given numerical aperture to another component/system with another numerical aperture. The invention further relates to methods of producing the optical component, and articles comprising the optical component, and to the use of the optical component. The invention further relates to an optical component comprising a bundle of input fibres that are tapered and fused together to form an input coupler e.g. for coupling light from several light sources into a single waveguide. The invention still further relates to the control of the spatial extension of a guided mode (e.g. a mode-field diameter) of an optical beam in an optical fibre. The invention relates to a tapered longitudinally extending optical waveguide having a relatively larger cross­section that over a certain longitudinal distance is tapered down to a relatively smaller cross section wherein the spatial extent of the guided mode is substantially constant or expanding from the relatively larger to the relatively smaller waveguide cross section. The invention may e.g. be useful in applications such as fibre lasers or amplifiers, where light must be coupled efficiently from pump sources to a double clad fibre.
    • 本发明一般涉及将来自一个或多个输入波导的光耦合到具有除输入波导或波导之外的其他物理尺寸和/或光学特性的波导的输出波导或输出部分。 本发明涉及光子晶体光纤形式的光学部件,用于将来自具有给定数值孔径的一个部件/系统的光耦合到具有另一数值孔径的另一部件/系统。 本发明进一步涉及制造光学部件的方法,以及包括该光学部件的制品以及该光学部件的用途。 本发明还涉及一种光学部件,其包括一束输入光纤,所述输入光纤被渐缩并融合在一起以形成输入耦合器,例如, 用于将来自多个光源的光耦合到单个波导中。 本发明还涉及对光纤中光束的导模(例如模场直径)的空间扩展的控制。 锥形纵向延伸光波导本发明涉及一种具有相对较大横截面的锥形纵向延伸光波导,其在一定的纵向距离上向下逐渐缩小至相对较小的横截面,其中导模的空间范围基本上是恒定的或从相对较大的相对较大 较小的波导横截面。 本发明可以例如 可用于诸如光纤激光器或放大器等应用,其中光源必须从泵浦源高效耦合到双包层光纤。
    • 4. 发明申请
    • METHOD AND DEVICE FOR SPECTRAL FILTERING
    • 用于光谱过滤的方法和装置
    • WO2004023182A1
    • 2004-03-18
    • PCT/FI2003/000646
    • 2003-09-04
    • LIEKKI OYTAMMELA, Simo
    • TAMMELA, Simo
    • G02B6/22
    • G02B6/036G02B6/02G02B6/02052G02B6/03605G02B6/03627G02B2006/0209
    • The invention refers to a method and a device in optical fiber based spectral filtering, where a length of an optical fiber (40) comprising at least a core region (CR) surrounded by a cladding region (CL) is coiled over its length in whole or in part to subject the fiber to longitudinal curvature in order to affect the optical transmission properties of the fiber. According to the invention the fiber (50) is arranged to have radially asymmetric refractive index distribution (R) and in addition to coiling the fiber lengthwise, the fiber is over its length in whole or in part also twisted around its longitudinal axis. The invention can be used to significantly improve the performance of fiber based filtering devices.
    • 本发明涉及一种基于光纤的光谱滤波的方法和装置,其中至少包括由包层区域(CL)围绕的核心区域(CR)的光纤(40)的长度在整个长度上被卷绕 或部分地使纤维经受纵向弯曲,以影响纤维的光学传输性能。 根据本发明,纤维(50)被布置成具有径向不对称的折射率分布(R),并且除了纵向卷绕纤维之外,纤维整个或部分地也围绕其纵向轴线扭曲。 本发明可用于显着提高基于纤维的过滤装置的性能。