公开(公告)号：US20020144521A1

公开(公告)日：2002-10-10

申请号：US10117228

申请日：2002-04-08

Applicant: ALCATEL

Inventor： Gerard Orcel ,  Marc Nicolardot ,  Jean-Florent Campion

IPC: C03B037/018 ,  C03B037/075

CPC classification number: C03B37/01291 ,  C03B37/01205 ,  C03B37/01892 ,  C03B2201/075 ,  C03B2201/12 ,  C03B2201/20

Abstract: The invention provides a low cost method of manufacturing high capacity preforms by chemical vapor deposition. More particularly, there is described a method of manufacturing an optical fiber preform, which method comprises the steps of providing a substrate tube of silica doped with sufficient chlorine to obtain an OH concentration of less than 100 ppb and doped with sufficient fluorine proportional to the chlorine doping to obtain a refractive index that is lower than that of a natural silica, depositing inner cladding and an optical core inside the substrate tube, collapsing the substrate tube to form a primary preform, and depositing outer cladding of said natural silica on the resulting primary preform. The invention is applicable to manufacturing optical fibers.

Abstract translation: 本发明提供了一种通过化学气相沉积制造高容量预成型件的低成本方法。 更具体地，描述了一种制造光纤预制件的方法，该方法包括以下步骤：提供掺杂足够氯的二氧化硅衬底管，以获得小于100ppb的OH浓度并掺入与氯成正比的足够的氟 掺杂以获得低于天然二氧化硅的折射率，在衬底管内沉积内包层和光学芯，使衬底管折叠以形成初级预制件，并将所述天然二氧化硅的外包层沉积在所得到的初级 预制件。 本发明适用于制造光纤。

公开(公告)号：US20020006260A1

公开(公告)日：2002-01-17

申请号：US09871812

申请日：2001-06-04

Applicant: ALCATEL

Inventor： Gerard Orcel ,  Sophie Dubois ,  Jean-Florent Campion

IPC: G02B006/22

CPC classification number: G02B6/02395 ,  C03B37/01291 ,  C03B37/01413 ,  C03B37/016 ,  C03C17/23 ,  C03C25/1061 ,  C03C2217/214 ,  C03C2217/23

Abstract: The invention relates to an optical fiber preform comprising an optical core, optical cladding, and an outer sheath, in which the outer sheath includes a peripheral zone containing 20% to 100% by weight alumina and 80% to 0% by weight silica. Such a preform makes it possible to obtain optical fibers having improved mechanical strength and improved impermeability to hydrogen.

Abstract translation: 本发明涉及一种包括光学芯，光学包层和外护套的光纤预制件，其中外护套包括含有20重量％至100重量％氧化铝和80重量％至0重量％二氧化硅的周边区域。 这样的预成型体使得可以获得具有改善的机械强度和改善对氢的不渗透性的光纤。