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1. 发明申请

US20040086243A1 Systems and methods for reducing splice loss in optical fibers 有权
标题翻译：降低光纤接头损耗的系统和方法
公开(公告)号：US20040086243A1
公开(公告)日：2004-05-06
申请号：US10287307
申请日：2002-11-04
申请人： Fitel USA Corp.
发明人： David John DiGiovanni , Peter Mikal Holmblad , Torben E. Veng , Andrew D. Yablon
IPC分类号： G02B006/02 , G02B006/16
CPC分类号： G02B6/03644 , C03B37/01413 , C03B37/01807 , C03B37/027 , C03B2201/10 , C03B2201/28 , C03B2203/22 , C03B2203/222 , C03B2203/36 , C03B2205/40 , G02B6/03666 , G02B6/03694 , G02B6/2551
摘要： Optical fibers are described that exhibit reduced splice loss. Further described are techniques for fabricating optical fibers exhibiting reduced splice loss. One described fiber includes a plurality of regions, one region having a higher viscosity and the other region having a lower viscosity, such that when the fiber is drawn under tension, a strain is frozen into the higher viscosity region. A lower viscosity buffer layer is sandwiched between the higher viscosity region and the lower viscosity region. The buffer layer isolates the lower viscosity region from changes in refractive index in the higher viscosity region arising from a change in the strain frozen into the higher viscosity region.
摘要翻译：描述了表现出减少的接合损耗的光纤。进一步描述的是制造具有减小的接合损耗的光纤的技术。一种所述的纤维包括多个区域，一个区域具有较高的粘度，另一个区域具有较低的粘度，使得当纤维在张力下拉伸时，应变被冻结到较高粘度的区域中。较低粘度的缓冲层夹在较高粘度区域和较低粘度区域之间。缓冲层将较低粘度区域与由较冷粘度变为较高粘度区域的应变的变化引起的较高粘度区域的折射率变化相分离。

2. 发明申请

US20040013374A1 Systems and methods for fabricating low-loss, high-strength optical fiber transmission lines 有权
标题翻译：制造低损耗，高强度光纤传输线的系统和方法
公开(公告)号：US20040013374A1
公开(公告)日：2004-01-22
申请号：US10197192
申请日：2002-07-17
申请人： Fitel USA Corp.
发明人： David John DiGiovanni , Torben E. Veng
IPC分类号： G02B006/255
CPC分类号： G02B6/2551 , C03B23/043 , C03B37/15 , F23D14/40
摘要： Systems and techniques are described for fabricating a low-loss, high-strength optical transmission line. In one described technique, a first fiber is spliced to a second fiber at a splice point. The spliced fibers are loaded into a heat treatment station, where a gas torch flame is used to thermally treat a splice region including the splice point, with the thermal treatment reducing splice loss between the first and second fibers. While heating the splice region, a dry gas is purged around the torch flame during the heat treatment process to avoid water at the surface of the spliced fibers. According to further described techniques, a purging gas is fed to the torch flame to purge dust particles from the flame, and after the heat treatment has been completed, the torch flame is used to restore the glass surface of the spliced fibers. Additionally described are torch assemblies for fabricating low-loss, high-strength optical fiber transmission lines.
摘要翻译：描述了用于制造低损耗高强度光传输线的系统和技术。在一种所描述的技术中，第一光纤在拼接点处被接合到第二光纤。接合的纤维被装载到热处理站中，其中使用气体焰炬火焰来热处理包括接合点的接合区域，热处理减少了第一和第二纤维之间的接合损耗。在加热接合区域的同时，在热处理过程中，在割炬火焰周围清除干燥气体，以避免接合纤维表面的水分。根据进一步描述的技术，将吹扫气体供给到火炬火焰以从火焰中吹扫灰尘颗粒，并且在热处理完成之后，使用割炬火焰来还原拼接纤维的玻璃表面。另外描述了用于制造低损耗，高强度光纤传输线的火炬组件。

3. 发明申请

US20040031290A1 High-temperature sintering of soot bodies doped using molecular stuffing 失效
标题翻译：使用分子填料掺杂烟灰体的高温烧结
公开(公告)号：US20040031290A1
公开(公告)日：2004-02-19
申请号：US10222247
申请日：2002-08-16
申请人： Fitel USA Corp.
发明人： David John DiGiovanni , Kyunghwan Oh
IPC分类号： C03B037/016 , C03B037/075
CPC分类号： C03B37/01248 , C03B37/01211 , C03B37/0126 , C03B37/01433 , C03B37/016 , C03B2201/30 , C03C21/001
摘要： Techniques are described for fabricating a preform from a soot body. In one described technique, a soot body is loaded into a substrate tube, and the position of the soot body is stabilized within the tube. The tube is then rotated around its longitudinal axis. Heat is applied from a heat source to the substrate tube at a first end of the soot body to cause the first end of the soot body to begin to sinter and to cause the substrate tube to begin to at least partially collapse around the sintered portion of the soot body. The heat source is then advanced along the substrate tube and the soot body to cause a progressive sintering of the soot body, and to cause a progressive, at least partial, collapse of the substrate tube around the sintered portion of the soot body.
摘要翻译：描述了从烟灰体制造预制件的技术。在一种所述的技术中，将烟灰体装载到衬底管中，并且烟灰体的位置在管内稳定。然后将管围绕其纵向轴线旋转。在烟灰体的第一端处从热源向基材管施加热量，以使烟灰体的第一端开始烧结，并使基材管开始至少部分地在烧结部分烟灰体。然后，热源沿着衬底管和烟灰体前进，以引起烟灰体的逐渐烧结，并引起衬底管在烟灰体的烧结部分周围的渐进的，至少部分的塌陷。

4. 发明申请

US20030174981A1 Dispersion compensating module and fiber for control of residual dispersion 有权
标题翻译：色散补偿模块和光纤用于控制残留色散
公开(公告)号：US20030174981A1
公开(公告)日：2003-09-18
申请号：US10098679
申请日：2002-03-15
申请人： Fitel USA Corp.
发明人： David John DiGiovanni , William A. Reed , Man F. Yan , Lars Gruner-Nielsen , Susanne Dyrbol
IPC分类号： G02B006/16
CPC分类号： G02B6/02261 , G02B6/03611 , G02B6/03644 , G02B6/29376 , G02B6/29395
摘要： A dispersion compensating fiber and module are described for controlling residual dispersion in a dispersion compensated system. The dispersion compensating fiber is designed with dispersion curve having an inflection point at a wavelength near the optical transmission operating wavelength region. The dispersion curve, having an inflection point near the operating wavelength region, produces a relative dispersion slope that closely matches the relative dispersion slope of the transmission fiber over a relatively wide bandwidth surrounding the operating wavelength region.
摘要翻译：描述了用于控制色散补偿系统中的残余色散的色散补偿光纤和模块。色散补偿光纤被设计成具有在光传输工作波长区域附近的波长处具有拐点的色散曲线。具有靠近工作波长区域的拐点的色散曲线产生与围绕工作波长区域的相对宽的带宽上的传输光纤的相对色散斜率紧密匹配的相对色散斜率。

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