公开(公告)号：EP1507154B1

公开(公告)日：2008-01-30

申请号：EP03752909.6

申请日：2003-05-16

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  Mitsubishi Cable Industries, Ltd.

发明人： SUZUKI,Kazunori c/o NTT Intellectual Property Cent ,  Satoki KAWANISHI c/o NTT Intellectual Property Cen ,  Hirokazu KUBOTA c/o NTT Intellectual Property Cent ,  TANAKA, M., MITSUBISHI CABLE INDUSTRIES, LTD. ,  FUJITA, Moriyuki, MITSUBISHI CABLE INDUSTRIES, LTD

IPC分类号： G02B6/02

CPC分类号： G02B6/02338 ,  G02B6/02042 ,  G02B6/02242 ,  G02B6/02276 ,  G02B6/02347 ,  G02B6/02361 ,  G02B6/0281 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/03688

摘要： A 1.55-micron-zone dispersion shift optical fiber low in loss and gentle in dispersion slope. A core area a is formed by adding high-concentration GeO2. A core area b consists of pure SiO2 glass. Many holes (4) extending in a longitudinal direction of the optical fiber are formed in a clad section (3) disposed around core areas. The positions of holes (4) in the clad section (3) are not at random, and they form a honeycomb shape where a regular hexagon having a side length of Lambda is used as a basic lattice. At the center of core areas (1, 2), an area (3) higher in refractive index than the area surrounding the core areas (1, 2) is provided, and the refractive index distributions of the core areas (1, 2) are provided such that the group velocity dispersion at an operation wavelength of this area (3) is a normal dispersion.

摘要翻译： 1.55微米区域的色散位移光纤损耗低，色散斜率平缓。 核心区域a通过添加高浓度的GeO2而形成。 核心区域b由纯SiO2玻璃组成。 沿着光纤的纵向延伸的许多孔（4）形成在设置在核心区域周围的包层部分（3）中。 包层部分（3）中的孔（4）的位置不是随机的，并且它们形成蜂窝形状，其中具有Lambda边长的正六边形被用作基本格子。 在核心区域（1,2）的中心，设置折射率比核心区域（1,2）周围的区域高的区域（3），核心区域（1,2）的折射率分布， 被设置为使得该区域（3）的工作波长处的群速度色散是正常色散。

公开(公告)号：EP1507154A1

公开(公告)日：2005-02-16

申请号：EP03752909.6

申请日：2003-05-16

申请人： Nippon Telegraph and Telephone Corporation ,  Mitsubishi Cable Industries, Ltd.

发明人： SUZUKI,Kazunori c/o NTT Intellectual Property Cent ,  Satoki KAWANISHI c/o NTT Intellectual Property Cen ,  Hirokazu KUBOTA c/o NTT Intellectual Property Cent ,  TANAKA, M., MITSUBISHI CABLE INDUSTRIES, LTD. ,  FUJITA, Moriyuki, MITSUBISHI CABLE INDUSTRIES, LTD

IPC分类号： G02B6/20

CPC分类号： G02B6/02338 ,  G02B6/02042 ,  G02B6/02242 ,  G02B6/02276 ,  G02B6/02347 ,  G02B6/02361 ,  G02B6/0281 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/03688

摘要： A 1.55 µm band dispersion shifted optical fiber is provided which has a low loss and low dispersion slope. A core region "a" is heavily doped with GeO 2 . A core region "b" is composed of pure SiO 2 glass. A cladding section 3 is arranged around the core region. The cladding section 3 has a lot of holes 4 extending in the longitudinal direction of the optical fiber. The holes 4 of the cladding section 3 are not located at random, but have a honeycomb structure composed of regular hexagons which have a side length of A, and serve as a primitive lattice. The center of the core region 1 and 2 has a region 3 having a refractive index higher than that of the periphery of the core section 1 and 2. The core region 1 and 2 has the refractive index distribution in which the group velocity dispersion at the operation wavelength of the region 3 becomes the normal dispersion.

摘要翻译： 提供具有低损耗和低色散斜率的1.55μm频带色散位移光纤。 核心区域“a”用GeO2重掺杂。 核心区域“b”由纯SiO2玻璃组成。 包层部分3围绕核心区域布置。 包层部分3有许多沿光纤纵向延伸的孔4。 包层部分3的孔4不是随机定位的，而是具有由边长为A的正六边形组成的蜂窝结构，并且用作原始格。 芯区域1和2的中心具有折射率高于芯部1和2的周边的区域3.芯区域1和2具有折射率分布，其中在 区域3的操作波长变为正常色散。