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    • 4. 发明专利
    • Optical fiber
    • 光纤
    • JP2014119558A
    • 2014-06-30
    • JP2012273698
    • 2012-12-14
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社Hokkaido Univ国立大学法人北海道大学
    • SAKAMOTO YASUSHIHANZAWA NOBUTOMOMATSUI TAKASHITSUJIKAWA KYOZOSAITO KUNIMASAKOSHIBA MASANORI
    • G02B6/00G02B6/032
    • PROBLEM TO BE SOLVED: To solve the problem that although further enlargement of an effective cross-section area is required to reduce a nonlinear phenomenon generated in an optical fiber, the vast enlargement of the effective cross-sectional area is difficult even when a conventional photonic crystal fiber is used.SOLUTION: In an optical fiber arranged in a triangular lattice shape around a core area and having a plurality of uniform holes in a longitudinal direction of the optical fiber, An area obtained by removing seven holes in the center of triangular lattice arrangement is the core area, and the number of layers of holes around the core area is 4-7. Each value of an interval Λ between the centers of adjacent holes and a ratio d/Λ of a diameter d of the hole to the interval Λ between the centers is set so as to satisfy a relation represented in an area having an effective cross section area of 180 μmsurrounded by two curves and a straight line.
    • 要解决的问题为了解决为了减少光纤中产生的非线性现象而需要进一步扩大有效截面面积的问题,即使常规的光子学方法也难以有效的横截面积的大幅扩大 使用晶体光纤。解决方案:在围绕芯区域布置成三角形格子状的光纤中,并且在光纤的纵向方向上具有多个均匀的孔,通过去除三角形晶格中心的七个孔获得的面积 排列是核心区域,核心区域周围的洞层数为4-7。 相邻孔的中心之间的间隔Λ的每个值和孔的直径d与中心之间的间隔Λ的比d /Λ设定为满足在具有有效截面面积的区域中表示的关系 180微米,由两条曲线和一条直线组成。
    • 6. 发明专利
    • Hole structure optical fiber and optical transmission system using the same
    • 孔结构光纤和光传输系统
    • JP2010217472A
    • 2010-09-30
    • JP2009063898
    • 2009-03-17
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社
    • MATSUI TAKASHITSUJIKAWA KYOZOTOMITA SHIGERU
    • G02B6/00G02B6/032
    • PROBLEM TO BE SOLVED: To provide a hole structure optical fiber that has a larger effective cross section than a conventional optical fiber while guaranteeing single-mode operation and maintaining a standard for bending loss, and to provide an optical transmission system using the same. SOLUTION: The hole structure optical fiber 11 has a structure configured such that the optical fiber has a plurality of holes 12 with uniform diameters along the length of the optical fiber and the plurality of holes 12 are arrayed in a plurality of layers around a core region to form a plurality of hole layers 14A, 14B, and 14C, the diameter d1 of holes 12 in the innermost hole layer 14C among the plurality of hole layers 14A, 14B, and 14C being larger than the diameter (d) of holes 12 in the outermost hole layer 14C among the plurality of hole layers 14A, 14B, and 14C. The optical transmission system includes: an optical transmission line including the hole structure optical fiber; an optical signal regeneration unit having a DCF provided to the optical transmission line; an optical transmission unit; and an optical receiving unit. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:为了提供一种具有比常规光纤更大的有效截面的孔结构光纤,同时保证单模操作并保持弯曲损耗的标准,并且提供一种使用 相同。 解决方案:孔结构光纤11具有这样构造的结构,使得光纤具有沿着光纤的长度具有均匀直径的多个孔12,并且多个孔12围绕多个排列 形成多个孔层14A,14B和14C的芯区域,多个孔层14A,14B和14C中的最内孔层14C中的孔12的直径d1比直径(d)大 多个孔层14A,14B,14C中的最外层层14C的孔12。 光传输系统包括:包括孔结构光纤的光传输线; 光信号再生单元,具有提供给光传输线的DCF; 光传输单元; 和光接收单元。 版权所有(C)2010,JPO&INPIT