公开(公告)号：EP1101744A2

公开(公告)日：2001-05-23

申请号：EP00309835.7

申请日：2000-11-06

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： DiGiovanni, David John ,  Golowich, Steven Eugene ,  Jones, Sean L. ,  Reed, William Alfred

IPC: C03B37/012 ,  C03B37/018 ,  C03B37/027 ,  C03B37/03 ,  G02B6/16

CPC classification number: C03B37/02745 ,  C03B37/01228 ,  C03B37/01869 ,  C03B37/027 ,  C03B2203/19 ,  C03B2205/06 ,  G02B6/02 ,  G02B6/02052 ,  G02B6/02285 ,  G02B6/0288 ,  G02B2006/0209 ,  Y02P40/57

Abstract: Our method of making high bandwidth silica-based multimode optical fiber comprises provision of a non-circular preform, and drawing fiber of chiral structure from the preform. The non-circular preform can be made by maintaining the inside of the tubular preform under reduced pressure during at least part of the collapse, resulting in a non-circular core and cladding. It can also be made by removal (e.g., by grinding or plasma etching) of appropriate portions of the preform, resulting in a circular core and non-circular cladding. In the latter case, fiber is drawn at a relatively high temperature such that, due to surface tension, the cladding assumes substantially circular shape and the core assumes a non-circular shape. The chiral structure is imposed on the fiber in any appropriate way, e.g., by twisting during fiber drawing the fiber alternately in clockwise and couterclockwise sense relative to the preform.

公开(公告)号：EP1156019A2

公开(公告)日：2001-11-21

申请号：EP01302471.6

申请日：2001-03-19

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Golowich, Steven Eugene ,  Jones, Sean L. ,  Ritger, Albert John ,  Thornburg, K. Scott, Jr.

IPC: C03B37/012 ,  G02B6/16

CPC classification number: C03B37/012 ,  G02B6/02 ,  G02B6/0281

Abstract: Embodiments of the invention include an optical fiber preform (30) and a multimode optical fiber drawn therefrom that has improved overfill-launch bandwidth performance without disturbing existing laser-launch bandwidth performance. The optical fiber preform includes a core region (34) configured to have a refractive index with a characteristic differential mode delay with a first portion associated with lower order modes that behaves conventionally and a second portion associated with higher order modes that deviates from conventional behavior in a way that improves overfill-launch bandwidth performance at one operating window without adversely impacting the laser-launch bandwidth performance at the same and other operating windows. Preform configurations conventionally optimized for operation at 850 nm are configured in such a way that their characteristic differential mode delay, at 1300 nm, initially increases in a conventional manner and then flattens out to approximately zero at the higher order modes. At 850 nm, the characteristic differential mode delay initially remains flat at approximately zero, in a conventional manner, and then decreases at the higher order modes.

Abstract translation: 本发明的实施例包括光纤预制件（30）和从其中抽出的多模光纤，其具有改进的过充满发射带宽性能而不干扰现有的激光发射带宽性能。 光纤预制件包括芯区域（34），其被构造成具有特性差模延迟的折射率，第一部分与常规行为的低阶模式相关联，以及与高阶模式相关联的第二部分与偏离常规行为的第二部分 这样可以在一个操作窗口中改善过充电启动带宽性能，而不会对相同和其他操作窗口的激光发射带宽性能造成不利影响。 传统上为850nm操作而优化的预成型配置被配置成使得它们在1300nm下的特征差模延迟最初以常规方式增加，然后在高阶模式下变平到大约零。 在850nm处，特征性差模延迟最初以常规方式保持在大约零度平坦，然后在高阶模式下降低。

公开(公告)号：EP1101744A3

公开(公告)日：2002-06-12

申请号：EP00309835.7

申请日：2000-11-06

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： DiGiovanni, David John ,  Golowich, Steven Eugene ,  Jones, Sean L. ,  Reed, William Alfred

IPC: C03B37/012 ,  C03B37/018 ,  C03B37/027 ,  C03B37/03 ,  G02B6/16 ,  G02B6/18 ,  H04B10/18

CPC classification number: C03B37/02745 ,  C03B37/01228 ,  C03B37/01869 ,  C03B37/027 ,  C03B2203/19 ,  C03B2205/06 ,  G02B6/02 ,  G02B6/02052 ,  G02B6/02285 ,  G02B6/0288 ,  G02B2006/0209 ,  Y02P40/57

Abstract: Our method of making high bandwidth silica-based multimode optical fiber comprises provision of a non-circular preform, and drawing fiber of chiral structure from the preform. The non-circular preform can be made by maintaining the inside of the tubular preform under reduced pressure during at least part of the collapse, resulting in a non-circular core and cladding. It can also be made by removal (e.g., by grinding or plasma etching) of appropriate portions of the preform, resulting in a circular core and non-circular cladding. In the latter case, fiber is drawn at a relatively high temperature such that, due to surface tension, the cladding assumes substantially circular shape and the core assumes a non-circular shape. The chiral structure is imposed on the fiber in any appropriate way, e.g., by twisting during fiber drawing the fiber alternately in clockwise and couterclockwise sense relative to the preform.

Abstract translation: 我们制造高带宽基于二氧化硅的多模光纤的方法包括：提供一种非圆形的预成形件，以及从所述预成型件的手性结构的拉伸纤维。 非圆形预成型件可以由所述崩溃的至少一部分期间保持在减压下的管状预成型件的内部，在一个非圆形的芯和包层所得到的制成。 因此，它可以通过除去制备（例如，通过研磨或等离子蚀刻）预制件的适当部分，在圆形芯和非圆形的覆层得到的。 在后一种情况下，纤维处于相对高温拉伸检查的是，由于表面张力，包层übernimmt基本上圆形的形状，并且所述芯übernimmt非圆形形状。 手性结构施加于以任何方式适当，E. G.纤维，由纤维加捻期间在顺时针和逆时针方向感相对于预成型件可替换地拉制光纤。

公开(公告)号：EP1156019A3

公开(公告)日：2003-05-14

申请号：EP01302471.6

申请日：2001-03-19

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Golowich, Steven Eugene ,  Jones, Sean L. ,  Ritger, Albert John ,  Thornburg, K. Scott, Jr.

IPC: C03B37/012 ,  G02B6/16

CPC classification number: C03B37/012 ,  G02B6/02 ,  G02B6/0281

Abstract: Embodiments of the invention include an optical fiber preform (30) and a multimode optical fiber drawn therefrom that has improved overfill-launch bandwidth performance without disturbing existing laser-launch bandwidth performance. The optical fiber preform includes a core region (34) configured to have a refractive index with a characteristic differential mode delay with a first portion associated with lower order modes that behaves conventionally and a second portion associated with higher order modes that deviates from conventional behavior in a way that improves overfill-launch bandwidth performance at one operating window without adversely impacting the laser-launch bandwidth performance at the same and other operating windows. Preform configurations conventionally optimized for operation at 850 nm are configured in such a way that their characteristic differential mode delay, at 1300 nm, initially increases in a conventional manner and then flattens out to approximately zero at the higher order modes. At 850 nm, the characteristic differential mode delay initially remains flat at approximately zero, in a conventional manner, and then decreases at the higher order modes.