Large core holey fiber
    6.
    发明专利
    Large core holey fiber 有权
    大孔芯纤维

    公开(公告)号:JP2014067053A

    公开(公告)日:2014-04-17

    申请号:JP2013241076

    申请日:2013-11-21

    摘要: PROBLEM TO BE SOLVED: To provide single mode and multi-mode holey fibers having large core dimensions, and a device and a system using these fibers as a laser and an amplifier.SOLUTION: The number of layers or rows of holes 170, 190, and 210 about cores 166, 186, and 206 is used to coarsely tune the leakage losses of the fundamental and higher modes of a signal, thereby allowing the non-fundamental modes to be substantially eliminated by leakage over a given length of fiber. Fine tuning of leakage losses is performed by adjusting hole dimensions d and/or spacing Λ to yield desired operation with a desired leakage loss of the fundamental mode. Resulting holey fibers have large hole dimensions d and spacing Λ when compared to traditional fibers and conventional fibers that propagate a single mode, and consequently the cores 166, 186, and 206 are large.

    摘要翻译: 要解决的问题:提供具有大芯尺寸的单模和多模多孔光纤,以及使用这些光纤作为激光器和放大器的装置和系统。解决方案:孔170,190, 并且关于芯166,186和206的210用于粗略地调谐信号的基本和更高模式的泄漏损耗,从而通过在给定长度的光纤上的泄漏来基本上消除非基本模式。 通过调节孔尺寸d和/或间隔Λ来执行泄漏损耗的微调,以产生所需的基本模式的泄漏损失的操作。 与传统的单纤维传统的纤维和常规纤维相比,所产生的多孔纤维具有较大的孔尺寸d和间隔Λ,因此纤芯166,186和206较大。

    Polarization-dependent hollow optical fiber

    公开(公告)号:JP5363218B2

    公开(公告)日:2013-12-11

    申请号:JP2009157400

    申请日:2009-07-02

    IPC分类号: G02B6/00 G02B6/024 G02B6/032

    摘要: In accordance with one aspect of my invention, the core and cladding regions of a hollow-core optical fiber arc configured so that a signal mode is coupled to a cladding mode in order to exploit polarization-dependent properties. In general, the fiber comprises a hollow-core region surrounded by a cladding region, which includes a localized hollow-waveguide region. The core and waveguide regions are configured so that the coupling between a signal mode in the core region and a cladding mode in the waveguide region are phase-matched for efficient coupling, and the phase-matching condition is made polarization-dependent to provide improved control of the fiber's polarization dependent properties. In a preferred embodiment, the cladding region comprises a bandgap structure. In one embodiment, the at least one region has a non-symmetric cross-sectional shape (e.g., oblong) with respect to one of its transverse axes. In an alternative embodiment, both the core region and the waveguide region are non-symmetric but with respect to orthogonal axes. In another embodiment, the at least one region has a multiplicity of micro-defects disposed at or near the periphery thereof and in a non-rotationally-symmetric pattern. In an alternative embodiment, both the core region and the waveguide region include a multiplicity of micro-defects at or near the periphery thereof in a non-rotationally-symmetric pattern. Optical fibers of this type find application in polarization-dependent optical couplers (e.g., splitters, polarizers) and in sensors.

    マルチコアファイバおよびマルチコアファイバのコアの配置方法

    公开(公告)号:JPWO2012026473A1

    公开(公告)日:2013-10-28

    申请号:JP2012530682

    申请日:2011-08-23

    IPC分类号: G02B6/04

    摘要: 複数の単一モードのコアを一本の光ファイバに収納するマルチコアファイバにおいて、マルチコアファイバは、ファイバ断面内において、複数の格子点が並進対称性、回転対称性、並進対称性および回転対称性の何れかの対称性を有して周期的に二次元配列された格子点配列において、格子点配列の格子点を基準位置として複数のコアを配置する。各コアの各伝搬定数に対して個々に異なる摂動を与えることによって各コアの伝搬定数をそれぞれの固有伝搬定数からずらし、前記伝搬定数のずれは、当該ずらした伝搬定数によって定まるコア間の結合量が所定の設定量を下回る結合の状態とする。同種コア間の結合を抑制することによって、同種コアを配置する距離を縮めることができ、異種コアの種類を増やすことなく、マルチコアファイバのコアを高密度化する。