| 发明名称 | Multi-core fiber | ||
| 摘要 | A multicore fiber includes six or more of core elements having a core, a first clad surrounding the outer circumferential surface of the core and a second clad surrounding the outer circumferential surface of the first clad, and includes a clad surrounding the core elements. All of expressions are satisfied: n1>n2>n3, n1>n4, n3<n4, wherein the refractive index of the core is n1, the refractive index of the first clad is n2, the refractive index of the second clad is n3, and the refractive index of the clad is n4. The core elements are disposed so that the inter-center pitch between the cores adjacent to each other is disposed at regular spacing and the centers of the cores are annularly disposed. | ||
| 申请公布号 | US9557476(B2) | 申请公布日期 | 2017.01.31 |
| 申请号 | US201414334138 | 申请日期 | 2014.07.17 |
| 申请人 | FUJIKURA LTD.;NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY | 发明人 | Matsuo Shoichiro;Saitoh Kunimasa;Koshiba Masanori |
| 分类号 | G02B6/02;G02B6/036;G02B6/028 | 主分类号 | G02B6/02 |
| 代理机构 | Westerman, Hattori, Daniels & Adrian, LLP | 代理人 | Westerman, Hattori, Daniels & Adrian, LLP |
| 主权项 | 1. A multi-core fiber comprising: six or more of core elements, each of the core elements including: a core;a first clad surrounding an outer circumferential surface of the core; anda second clad surrounding an outer circumferential surface of the first clad; anda clad surrounding the core elements, wherein: all of expressions are satisfied: n1>n2>n3 n1>n4 n3<n4 wherein a refractive index of the core is n1, a refractive index of the first clad is n2, a refractive index of the second clad is n3, and a refractive index of the clad is n4; the core elements are disposed so that an inter-center pitch between the cores adjacent to each other is disposed at regular spacings and centers of the cores are annularly disposed, and wherein an expression is satisfied:Aeff12Λ2≧0.0001XT+0.01 wherein crosstalk when light propagates through the cores for 100 km is XT (dB), effective areas of the cores are Aeff (μm2), and an inter-center pitch between the cores adjacent to each other is Λ. | ||
| 地址 | Tokyo JP | ||