公开(公告)号：US20160318792A1

公开(公告)日：2016-11-03

申请号：US15207816

申请日：2016-07-12

Applicant: Furukawa Electric Co., Ltd.

Inventor： Ichihiko SUGANUMA ,  Nobuaki ORITA ,  Akihiro KANAO

IPC: C03B37/014 ,  G02B6/00 ,  C03C13/04

CPC classification number: C03B37/01446 ,  B29D11/00721 ,  C03B37/014 ,  C03B37/0146 ,  C03C13/046 ,  C03C2213/00 ,  G02B6/00

Abstract: A production method of an optical fiber preform includes forming a porous preform by depositing a silica particle on a circumference of a target rod; and dehydrating and sintering the porous preform by at least three thermal treatment steps. A first and a second thermal treatment steps of the three thermal treatment steps dehydrate the porous preform in an atmosphere including halogen gas or halogen-based compound gas, and a processing temperature at the second thermal treatment step is higher than a processing temperature at the first thermal treatment step.

Abstract translation: 光纤预制棒的制造方法包括通过在目标棒的圆周上沉积二氧化硅粒子来形成多孔预成型体; 并通过至少三个热处理步骤脱水和烧结多孔预型体。 三个热处理步骤的第一和第二热处理步骤在包括卤素气体或卤素类化合物气体的气氛中使多孔预型体脱水，并且第二热处理步骤的处理温度高于第一热处理步骤的处理温度 热处理步骤。

公开(公告)号：US20140050450A1

公开(公告)日：2014-02-20

申请号：US14067631

申请日：2013-10-30

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Nobuaki ORITA ,  Akihiro KANAO ,  Hideya MORIDAIRA

IPC: G02B6/02

CPC classification number: G02B6/02395 ,  C03B37/01211 ,  C03B37/01245 ,  C03B37/01257 ,  C03B37/01446 ,  C03B37/01453 ,  C03B37/0146 ,  C03B37/02754 ,  C03B37/02772 ,  C03B37/029 ,  C03B2201/04 ,  C03B2201/12 ,  C03B2203/22 ,  Y02P40/57

Abstract: A porous layer is formed by depositing a silica glass particle around a core rod. The porous layer is dehydrated. The dehydrated porous layer is sintered under a decreased pressure until the dehydrated porous layer becomes a translucent glass layer containing a closed pore. The translucent glass layer is vitrified under an ambient atmosphere including an inert gas other than a helium gas.

Abstract translation: 通过在芯棒周围沉积石英玻璃颗粒来形成多孔层。 多孔层脱水。 脱水多孔层在减压下烧结直到脱水多孔层成为含有闭孔的半透明玻璃层。 半透明玻璃层在包括氦气以外的惰性气体的环境气氛下被玻璃化。