公开(公告)号：EP0836102B1

公开(公告)日：2004-04-21

申请号：EP97307669.8

申请日：1997-09-30

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Atkins, Robert Michael ,  Simoff, Debra Ann ,  Espindola, Rolando Patricio

IPC: G02B6/16

CPC classification number: G02B6/02138 ,  G02B6/02114 ,  G02B6/02152 ,  G02B2006/02161

公开(公告)号：EP0836102A3

公开(公告)日：1999-02-24

申请号：EP97307669.8

申请日：1997-09-30

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Atkins, Robert Michael ,  Simoff, Debra Ann ,  Espindola, Rolando Patricio

IPC: G02B6/16

CPC classification number: G02B6/02138 ,  G02B6/02114 ,  G02B6/02152 ,  G02B2006/02161

Abstract: The method of making an optical fiber refractive index grating comprises writing the grating through the fiber coating. The method involves providing optical fiber of significantly higher photosensitivity than conventional fiber, such that the grating can be written before unacceptable darkening of the coating occurs. Such fiber is H 2 and/or D 2 -loaded silica-based fiber having a Ge-doped core, the fiber selected to have a germanium-oxygen deficiency center content that provides the fiber with a photosensitivity that is at least twice as large as that of an otherwise identical, conventionally prepared, optical fiber. The fiber typically is drawn from a preform, at least a portion of which was exposed to a reducing atmosphere at an elevated temperature.

公开(公告)号：EP0955273A1

公开(公告)日：1999-11-10

申请号：EP99302854.7

申请日：1999-04-13

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Atkins, Robert Michael ,  Windeler, Robert Scott

IPC: C03B37/018

CPC classification number: C03B37/01807 ,  C03B37/01838 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/34 ,  C03B2201/36 ,  C03B2201/40

Abstract: Applicants have determined that much of the nonuniformity in solution doped preforms is due to nonuniformity of the soot layer caused by the high temperature necessary for complete reaction, and that MCVD fabrication using reaction temperature lowering gases such as nitrous oxide (N 2 O) can produce more uniform soot layers. The conventional oxygen/reactant gas mixture presents a very small temperature window in which a uniform silica soot layer can be deposited without sintering. If the temperature in oxygen is too low, SiCl 4 will not react completely and silicon oxychlorides will form. This degrades the soot layer and makes it unusable. If the temperature is too high the soot layer begins to sinter, decreasing the surface area and porosity. Adding a reaction temperature lowering gas lowers the reaction temperature and enables deposition of soot on the tube wall at a temperature substantially lower than the sintering temperature. This results in a more uniform, porous soot layer along the length of the preform and from one preform to another; and, in turn, the greater uniformity permits more uniform solution doping.

Abstract translation: 申请人已经确定了溶液掺杂预制件中的大部分不均匀性是由于完全反应所需的高温引起的烟灰层的不均匀性，并且使用反应温度降低气体如一氧化二氮（N 2 O）的MCVD制造可以产生更均匀的 烟灰层。 常规的氧气/反应物气体混合物呈现非常小的温度窗口，其中可沉积均匀的二氧化硅烟灰层而不烧结。 如果氧气中的温度太低，SiCl4将不会完全反应，而形成硅氯化物。 这会降低烟灰层，使其不可用。 如果温度太高，烟灰层开始烧结，减少表面积和孔隙率。 添加反应降温气体降低了反应温度，并且能够在基本上低于烧结温度的温度下将烟灰沉积在管壁上。 这导致沿着预成型件的长度和从一个预制件到另一个的更均匀的多孔的烟灰层; 反过来，更大的均匀性允许更均匀的溶液掺杂。

公开(公告)号：EP0836102A2

公开(公告)日：1998-04-15

申请号：EP97307669.8

申请日：1997-09-30

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Atkins, Robert Michael ,  Simoff, Debra Ann ,  Espindola, Rolando Patricio

IPC: G02B6/16

CPC classification number: G02B6/02138 ,  G02B6/02114 ,  G02B6/02152 ,  G02B2006/02161

Abstract: The method of making an optical fiber refractive index grating comprises writing the grating through the fiber coating. The method involves providing optical fiber of significantly higher photosensitivity than conventional fiber, such that the grating can be written before unacceptable darkening of the coating occurs. Such fiber is H 2 and/or D 2 -loaded silica-based fiber having a Ge-doped core, the fiber selected to have a germanium-oxygen deficiency center content that provides the fiber with a photosensitivity that is at least twice as large as that of an otherwise identical, conventionally prepared, optical fiber. The fiber typically is drawn from a preform, at least a portion of which was exposed to a reducing atmosphere at an elevated temperature.

Abstract translation: 光纤折射率光栅包括通过光纤涂层写入光栅的制造的方法。 该方法包括提供显着更高的光敏性光纤比传统纤维，检查做的光栅可以在发生涂层的不可接受的颜色变深之前被写入。 搜索纤维是H 2和/或D 2加载的具有掺Ge的芯二氧化硅基纤维，所选择的纤维为具有锗氧缺乏中心内容确实提供一个具有感光性的纤维做是至少两倍那样的大 在其它方面相同的，常规制备的，光纤。 该纤维是从预成型坯通常情况下，至少其一部分在高温下暴露于还原气氛中绘制。