公开(公告)号：US20070125129A1

公开(公告)日：2007-06-07

申请号：US11636200

申请日：2006-12-08

申请人： Sreena Dayanandan ,  Sanket Shah ,  Ravikiran Acharya ,  Jegan Miras

发明人： Sreena Dayanandan ,  Sanket Shah ,  Ravikiran Acharya ,  Jegan Miras

IPC分类号： C03B37/018 ,  C03B37/10

CPC分类号： C03B37/01473 ,  C03B37/01446 ,  C03B37/01486

摘要： A method for producing optical fiber preform capable of producing optical fiber having low and uniform optical attenuation loss along its entire length including :he top end portion is provided. The method comprises carrying out simultaneously sintering and collapsing steps by inserting the dehydrated hollow soot porous body; with predetermined speed in hot zone of the furnace till its top end reaches the hot zone and is left for a predetermined duration thereafter the preform is uplifted for a predetermined length at a predetermined speed to avoid heat loss in the optical)reform and re-inserted in the hot zone of sintering furnace at a predetermined speed and left for predetermined duration to result in formation of the preform having collapsed capillary including at its top end.

摘要翻译： 一种制造光纤预制棒的方法，该光纤预制棒能够制造其整个长度上具有低且均匀的光衰减损耗的光纤，包括：提供其顶端部分。 该方法包括通过插入脱水的中空烟炱多孔体同时进行烧结和塌陷步骤; 以预定的速度在炉的热区中直到其顶端到达热区并且保持预定的持续时间，此后预成型体以预定的速度提升预定的长度，以避免光学改造中的热损失并重新插入 在预定速度的烧结炉的热区中，并且保持预定的持续时间，从而形成具有包括在其顶端的折叠毛细管的预成型件。

公开(公告)号：US20080285927A1

公开(公告)日：2008-11-20

申请号：US11814216

申请日：2007-04-20

申请人： Amjad Khan ,  Sanket Shah ,  Jegan Miras

发明人： Amjad Khan ,  Sanket Shah ,  Jegan Miras

IPC分类号： G02B6/02 ,  C03B37/012

CPC分类号： C03B37/01446 ,  C03B2201/31 ,  C03B2203/24

摘要： A method for manufacturing an optical fiber having uniform refractive index profile, and substantially reduced macrobending loss and attenuation loss is provided comprising controlling one or more of parameters including concentration of dopant in outer region and inner region of the core region with respect to middle region of the core region of the optical fiber preform, duration of dehydration process step, concentration of chlorine gas to control refractive index of outer region and inner region of the core region for achieving a fiber having substantially uniform refractive index profile, and substantially reduced macrobending loss and attenuation loss.

摘要翻译： 提供一种制造具有均匀折射率分布的光纤的方法，并且显着降低了宏观弯曲损耗和衰减损耗，包括控制一个或多个参数，所述参数包括在芯区域的外部区域和内部区域中的掺杂剂的浓度相对于 纤维预制棒的核心区域，脱水工艺步骤的持续时间，氯气的浓度以控制外部区域的折射率和芯部区域的内部区域，以实现具有基本均匀的折射率分布的纤维，并且显着降低宏弯曲损耗， 衰减损耗。