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    • 1. 发明申请
    • SINGLE MODE OPTICAL FIBER
    • 单模光纤
    • WO2010011276A3
    • 2010-04-08
    • PCT/US2009004154
    • 2009-07-17
    • CORNING INCMISHRA SNIGDHARAJ K
    • MISHRA SNIGDHARAJ K
    • G02B6/028G02B6/036
    • G02B6/02257G02B6/03644
    • A single mode optical fiber comprises: (i) a segmented core having at least three segments and (ii) a silica based clad layer surrounding and in contact with the core, the clad layer having a refractive index nc.. The first segment has a ? max % in the range of about 0.75 to 1.1, and ?o % = 0.6?max %, and an outer radius r 1 in the range of about 1.5 to 3.0 µm. The second segment has a ? 2 % in the range of 0.00 to 0.15%. The third segment has a ? 3 % in the range of less than 0.35%, an outer radius r3 in the range of about 7 µm to 11 µm, a width W3 in the range of about 1.5 to 3 µm, and volume V 3 2 . The refractive index profiles of the core segments are selected to provide: zero dispersion wavelength in the range of about 1565 nm to 1600 nm; total dispersion at 1550 nm in the range of about -6 to-0.5 ps/nm-km; and dispersion slope at 1550 nm is greater than 0.1.
    • 单模光纤包括:(i)具有至少三个段的分段芯和(ii)围绕并与芯接触的基于二氧化硅的包层,所述包层具有折射率nc。第一段具有 ? 最大%在约0.75至1.1的范围内,以及θo%=0.6λmax%,外径r 1在约1.5至3.0μm的范围内。 第二段有一个? 2%在0.00至0.15%的范围内。 第三段有一个? 在小于0.35%的范围内为3%,外径半径r3在约7μm至11μm的范围内,宽度W3在约1.5至3μm范围内,体积V 3 2。 核心段的折射率分布被选择为提供:在约1565nm至1600nm范围内的零色散波长; 在1550nm处的总色散在约-6至-0.5ps / nm-km的范围内; 并且在1550nm处的色散斜率大于0.1。
    • 8. 发明申请
    • LARGE EFFECTIVE AREA FIBER
    • 大型有效区域纤维
    • WO2008136918A2
    • 2008-11-13
    • PCT/US2008005157
    • 2008-04-22
    • CORNING INCBICKHAM SCOTT RBOOKBINDER DANA CCHEN XINLI MING-JUNMISHRA SNIGDHARAJ KNOLAN DANIEL A
    • BICKHAM SCOTT RBOOKBINDER DANA CCHEN XINLI MING-JUNMISHRA SNIGDHARAJ KNOLAN DANIEL A
    • G02B6/036G02B6/032
    • G02B6/0365G02B6/02019
    • An optical fiber according to an embodiment of the present invention comprises: a glass core extending from a centerline to a radius R 1 wherein R 1 is greater than about 5 µm; a glass cladding surrounding and in contact with the core, the cladding comprising: (i) a first annular region extending from the radius R 1 to a radius R 2 the first annular region comprising a radial width, W 2 = R 2 - R 1 , (ii) a second annular region extending from the radius R 2 to a radius R 3 , and comprising a radial width, W 3 = R 3 - R 2 , and (iii) a third annular region surrounding the second annular region and extending from the radius R 3 to an outermost glass radius R 4 ; wherein the core comprises a maximum relative refractive index, ? 1max , relative to the third annular region, and wherein ? 1MAX is greater than about 0.1 % and less than about 0.3 %; the first annular region has a refractive index delta ? 2 (r) is less than about 0.025%; wherein the second annular region comprises a minimum relative refractive index, ? 3MIN , relative to the third annular region; wherein ? 1MAX > ? 2MAX > ? 3MIN , and ? 2MIN > ? 3MIN 2 and bend loss of ==0.5 dB/turn on a 20 mm diameter mandrel.
    • 根据本发明实施例的光纤包括:从中心线延伸到半径R 1 1的玻璃芯,其中R 1大于约5μm; 围绕并与芯接触的玻璃包层,所述包层包括:(i)从半径R 1> 1延伸到半径R 2的第一环形区域,所述第一环形 包括径向宽度的区域,(2)从半径R 2 到半径R 3 3,并且包括径向宽度,W 3 3 = R 3→R 2 和(iii)围绕第二环形区域并从半径R 3 3延伸到最外玻璃半径R 4的第三环形区域; 其中所述芯包括相对于所述第三环形区域的最大相对折射率α1 max,并且其中Δ1MAX1大于约0.1%且小于约0.3% ; 第一环形区域的折射率Δθ2(r)小于约0.025%; 其中所述第二环形区域相对于所述第三环形区域包括最小相对折射率β3ININ; 其中α1 M 1 M 2 M 2 M 3 M 3 M 1 M 2 N M N N N > <0; 并且其中所述芯和所述包层提供具有小于1500nm的电缆截止的光纤,并且在1550nm处的有效面积大于95μm2,并且对于20°的弯曲损耗为0.5dB / mm直径心轴。
    • 10. 发明申请
    • LOW ATTENUATION OPTICAL FIBER
    • 低衰减光纤
    • WO2007005276A2
    • 2007-01-11
    • PCT/US2006023977
    • 2006-06-20
    • CORNING INCMATTINGLY WILLIAM B IIIMISHRA SNIGDHARAJ KZHANG LU
    • MATTINGLY WILLIAM B IIIMISHRA SNIGDHARAJ KZHANG LU
    • G02B6/028G02B6/02
    • G02B6/0281
    • An optical waveguide fiber comprises: (a) a core with a refractive index profile having, a radius, an alpha and a relative refractive index characterized by delta% that varies along the radius; (b) at least one cladding surrounding the core; wherein the alpha is less than 2.5, peak refractive index delta % is between 0.34% and 0.4%, the relative refractive index is less than 0.01% for all radii greater than 7 µm, and this optical waveguide fiber has a mode field diameter MFD at a wavelength of 1310 nm of no more than 9.54 µm, and attenuation less than: (a) 0.329 dB/km at a wavelength of 1310 nm, (b) 0.290 dB/km at a wavelength of 1383nm, (c) 0.255 dB/km at a wavelength of 1410 nm, and (d ) 0.189 dB/km at a wavelength of 1550 nm.
    • 一种光波导光纤包括:(a)具有折射率分布的芯,其半径,α和相对折射率以δ%为特征,沿半径变化; (b)围绕所述芯的至少一个包层; 其中α小于2.5,峰值折射率Δ%在0.34%至0.4%之间,对于大于7μm的全部半径,相对折射率小于0.01%,并且该光导纤维的模场直径MFD在 波长1310nm的波长1310nm,衰减小于(a)波长1310nm为0.329dB / km,(b)1383nm波长为0.290dB / km,(c)为0.255dB / 波长为1410nm的km,(d)波长1550nm时为0.189dB / km。