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    • 34. 发明申请
    • POSITIVE DISPERSION LOW DISPERSION SLOPE FIBER
    • 正分散低分散斜面纤维
    • WO0019255A3
    • 2001-12-20
    • PCT/US9920057
    • 1999-08-31
    • CORNING INCMA DAIPINGSMITH DAVID K
    • MA DAIPINGSMITH DAVID K
    • G02B6/02G02B6/036G06T17/20G02B6/22C03B37/012G02B6/16
    • G02B6/03644G02B6/02014G02B6/02238G02B6/02271G02B6/0228G02B6/0281G02B6/0286G02B6/03611G02B6/03633G06T17/20
    • Disclosed is a single mode optical waveguide having a segmented core of at least two segments. The relative refractive index, the index profile and the radial dimensions of the core segments are selected to provide an optical waveguide fiber having properties suitable for a high performance telecommunication system operating in the wavelength window of about 1530 nm to 1570 nm. Embodiments of the invention having two, three and four segments are described to eliminate non-linear effects, such as FWM and SPM, which occur in a high performance, high rate systems, the effective area of the waveguide is made to be greater than about 60 mu m , more preferably greater than 65 mu m , and most preferably greater than 70 mu m . The total dispersion is preferably positive and equal to at least 2 ps/nm-km at 1530 nm. This total dispersion together with a total dispersion slope less than about 0.1 ps/nm -km insures a minimum FWM effect over the wavelength window.
    • 公开了具有至少两个段的分段核的单模光波导。 选择芯部段的相对折射率,折射率分布和径向尺寸以提供具有适合于在约1530nm至1570nm的波长窗口中操作的高性能电信系统的性质的光波导光纤。 描述了具有两个,三个和四个段的本发明的实施例以消除出现在高性能,高速率系统中的非线性效应,例如FWM和SPM,使波导的有效面积大于约 60μm2,更优选大于65μm2,最优选大于70μm2。 总色散优选为正,并且在1530nm处等于至少2ps / nm-km。 该总色散与小于约0.1ps / nm 2km的总色散斜率一起确保在波长窗口上具有最小的FWM效应。
    • 38. 发明申请
    • OPTICAL TRANSMISSION LINE
    • 光传输线
    • WO01001179A1
    • 2001-01-04
    • PCT/JP2000/004206
    • 2000-06-27
    • G02B6/02G02B6/036H04B10/25H04B10/2507H04B10/2525H04B10/255H04B10/2557H04B10/2563H04B10/2569G02B6/16G02B6/22
    • G02B6/02009G02B6/02004G02B6/02252G02B6/02261G02B6/02266G02B6/02271G02B6/02276G02B6/0228G02B6/02285G02B6/0281G02B6/03611G02B6/03627G02B6/03633G02B6/03644G02B6/29377H04B10/25253
    • An optical transmission line which can restrict both wavelength distortion due to a non-linear phenomenon and wavelength distortion due to dispersion, and which is formed by series-connecting a first optical fiber (8) having a dispersion value of 6 to 14 ps/nm/km in a set wavelength band in a wavelength band of 1.5 mu m and a second optical fiber (9) having a dispersion value of -14 to -6 ps/nm/km in the above set wavelength band, the dispersion slopes of the first optical fiber (8) and the second optical fiber (9) having signs opposite to each other. Light transmitted from an optical transmitter (11) is shone on the first optical fiber, and light transmitted through the first optical fiber (8) is shone on the second optical fiber (9). Absolute value of dispersion in a wavelength band of 1.5 mu m of each optical fiber (8), (9) is set to be at least 6 ps/nm/km to restrict four-light-wave mixing, and the above each absolute value is set to be up to 14 ps/nm/km to restrict local dispersion, to thereby render almost zeroes dispersion values and dispersion slopes in the above set wavelength band over the entire optical transmission line.
    • 一种光传输线,其可以限制由于非线性现象引起的波长失真和由于色散引起的波长失真,并且其通过串联连接具有6至14ps / nm的色散值的第一光纤(8)而形成 在上述设定的波长带中,在1.5μm的波长带中的设定​​波长带中具有分散值为-14至-6ps / nm / km的第二光纤(9)的/ 第一光纤(8)和具有彼此相反的符号的第二光纤(9)。 从光发射器(11)发射的光照射在第一光纤上,透过第一光纤(8)的光照射在第二光纤(9)上。 将每个光纤(8),(9)的1.5μm的波长带的色散的绝对值设定为至少6ps / nm / km以限制四个光波混合,并且上述每个绝对值 设定为14ps / nm / km以限制局部色散,从而在整个光传输线上使上述设定波长带中的色散值和色散斜率几乎为零。
    • 39. 发明申请
    • LARGE EFFECTIVE AREA WAVEGUIDE FIBER
    • 大型有效面积波导纤维
    • WO00055661A1
    • 2000-09-21
    • PCT/US2000/005948
    • 2000-03-07
    • G02B6/032G02B6/036G02B6/20G02B6/22
    • G02B6/03644G02B6/02014G02B6/0228G02B6/032G02B6/03611
    • Disclosed is a single mode optical waveguide fiber having a segmented core in which the central segment is a void (16). The shape and radial extent of the core segments are selected to provide a low dispersion slope together with large effective area and good bend resistance. Embodiments of the refractive index profiles in accord with the invention are shown having two or three annular segments (2, 6, 8) surrounding the central void. The presence of the void provides the benefits of a negative relative index located centrally in the core region without the process difficulties associated with the use of dopants that decrease the refractive index of the waveguide fiber.
    • 公开了一种单模光纤,其具有分段芯,其中中心段为空隙(16)。 选择芯段的形状和径向范围以提供低色散斜率以及大的有效面积和良好的抗弯曲性。 示出了根据本发明的折射率分布的实施例具有围绕中心空隙的两个或三个环形段(2,6,8)。 空隙的存在提供了位于芯区域中心的负相对指数的优点,而没有与使用降低波导纤维的折射率的掺杂剂相关的工艺困难。