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    Optical Fiber with Reduced E-Band and L-Band Loss Peaks and its method of manufacture
    2.
    发明公开
    Optical Fiber with Reduced E-Band and L-Band Loss Peaks and its method of manufacture 审中-公开
    的光纤具有降低的E-波段和L波段的损失和它们的制备方法

    公开(公告)号：EP1394125A1

    公开(公告)日：2004-03-03

    申请号：EP03019787.5

    申请日：2003-08-29

    申请人： FITEL USA CORPORATION (a Delaware Corporation)

    发明人： Atkins, Robert M. ,  Liu, Alice W. ,  Kristensen, Poul ,  Pedersen, Morten Ostergaard ,  Knudsen, Stig Nissen ,  Chang, Kai H. ,  Bromage, Jake ,  Nielsen, Jan Levin

    IPC分类号： C03B37/014 ,  C03C13/04 ,  G02B6/16

    CPC分类号： C03C13/045 ,  C03B37/014 ,  C03B2201/03 ,  C03B2201/07 ,  G02B6/02

    摘要： Applicants have discovered the existence of loss peaks in optical fiber transmission systems using wavelengths in the E-band and the L-band. Specifically, they have discovered the existence of narrow loss peaks at 1440 nm, 1583 nm and 1614 nm. Because the peaks are relatively narrow, they cannot be easily removed by conventional gain equalizers in long haul transmission systems, and although the peaks are relatively small, they can nonetheless cause transmission channels to drop out in amplified DWDM (Dense Wavelength Division Multiplexing) transmission systems. Applicants have further discovered that these loss peaks are due to carbon contamination of the transmission fiber. Thus optical fibers should be fabricated essentially free of carbon contamination. This means eliminating carbon-containing reagents in preform and tube-making processes. By the term carbon-free is preferably meant

    摘要翻译： 申请人已经发现在使用在E波段和L波段的波长光纤传输系统损耗峰值的存在。 具体而言，全心全意在1440纳米，1583纳米和1614纳米的发现的窄损耗峰值的存在。由于该峰是相对窄的，它们不能容易地通过在长距离光纤传输系统的传统增益均衡器除去，虽然峰是相对小的 ，它们可以但要使传输信道在扩增DWDM（密集波分复用）​​传输系统中，以滴出。 申请人已经发现进一步确实论文损耗峰值是由于传输光纤的碳污染。 THUS光纤应来制造实质上无碳污染。 这意味着消除在预成型件和制管过程含碳试剂。 由术语无碳优选地表示<1000ppm的重量的碳，更优选<10ppm以下，最优选<1ppm的。

    Dispersion-compensating module
    3.
    发明公开
    Dispersion-compensating module 审中-公开
    色散补偿模块

    公开(公告)号：EP1403669A2

    公开(公告)日：2004-03-31

    申请号：EP03020824.3

    申请日：2003-09-12

    申请人： FITEL USA CORPORATION, (A Delaware Corporation)

    发明人： Gruner-Nielsen, Lars ,  Le, Quang, Nghi, Trong ,  Kristensen, Poul ,  Wandel, Marie

    IPC分类号： G02B6/293 ,  G02B6/22 ,  G02B6/16 ,  H04B10/18

    CPC分类号： G02B6/02261 ,  G02B6/0228 ,  G02B6/02285 ,  G02B6/03611 ,  G02B6/03644 ,  G02B6/03694 ,  G02B6/29377 ,  H04B10/2525

    摘要： Disclosed is a dispersion-compensating (DC) module [740] comprising a first length of DC optical fiber [10] in tandem with a second length of a standard singlemode optical fiber. The DC fiber is fabricated from silica glass and has a refractive index profile that includes a core region [51] surrounded by a cladding region [52] having a nominal refractive index n 4 . The core region includes a central core [511] having a nominal refractive index n 1 , a "trench" [512] surrounding the central core having a nominal refractive index n 2 , and a "ridge" [513] surrounding the trench having a nominal refractive index n 3 . A range of refractive index profiles has been found that provides relative dispersion slopes (RDS) that are greater than 0.012 nm -1 and figures of merit that are greater than 200 ps/(nm-dB).

    摘要翻译： 公开了一种色散补偿（DC）模块[740]，其包括与第二长度的标准单模光纤串联的第一长度的DC光纤[10]。 DC光纤由石英玻璃制成并且具有包括由具有标称折射率n4的包层区域[52]围绕的芯区域[51]的折射率分布。 芯区包括具有标称折射率n1的中心芯[511]，围绕具有标称折射率n2的中心芯的“沟槽”[512]，以及围绕沟槽的“脊”[513]，其具有标称折射率 索引n3。 已经发现一系列折射率分布图，其提供大于0.012nm-1的相对色散斜率（RDS）和大于200ps /（nm-dB）的品质因数。