Optical fiber preform and its fabrication process
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B05D-005/06
G02B-006/02
출원번호
US-0903174
(1997-07-30)
우선권정보
FR-0009647 (1996-07-31)
발명자
/ 주소
Robin Thierry,FRX
Chariot Jean-Fran.cedilla.ois,FRX
출원인 / 주소
Alcatel Fibres Optiques, FRX
대리인 / 주소
Sughrue, Mion, Zinn, Macpeak & Seas, PLLC
인용정보
피인용 횟수 :
11인용 특허 :
5
초록▼
A process of fabricating an optical fiber preform, preferably a multimode optical fiber preform, having a maximum refractive index along an axis of the fiber and a lower refractive index at its periphery. The process includes the following steps: depositing successive layers onto the interior of the
A process of fabricating an optical fiber preform, preferably a multimode optical fiber preform, having a maximum refractive index along an axis of the fiber and a lower refractive index at its periphery. The process includes the following steps: depositing successive layers onto the interior of the tube with the refractive index increasing from the first, larger diameter layer to the central layer, each layer being formed from gases which react with each other inside the tube, and varying the proportions of the gases from one layer to another to vary the index. The gases are introduced into the tube at a velocity such that the radial index profile is homogenized in the longitudinal direction. This velocity is advantageously maintained substantially the same for the fabrication of all the layers. This process produces preforms having a homogeneous index profile in the longitudinal direction.
대표청구항▼
[ There is claimed:] [1.] A process for fabricating a multimode optical fiber preform having a maximum refractive index along an axis of the fiber and a lower refractive index at its periphery, said process including the following steps:depositing successive layers onto the interior of the tube with
[ There is claimed:] [1.] A process for fabricating a multimode optical fiber preform having a maximum refractive index along an axis of the fiber and a lower refractive index at its periphery, said process including the following steps:depositing successive layers onto the interior of the tube with the refractive index increasing from the first, larger diameter layer to the central layer, each layer being formed from gases which react with each other inside said tube, and varying the proportions of said gases from one layer to another to vary said index,wherein said gases are introduced into said tube at a velocity v such that the radial index profile is homogenized in the longitudinal direction, andwherein said velocity v is substantially the same for fabrication of all said layers. [10.] Preform for fabricating a multimode optical fiber having a refractive index that varies from its center to its periphery, said refractive index being higher at the center, along the axis, than at the periphery, said preform having only two parts in the longitudinal direction, a first part constituting an entry cone and a second part having an index profile that is practically constant throughout its length. A process for fabricating a multimode optical fiber preform having a maximum refractive index along an axis of the fiber and a lower refractive index at its periphery, said process including the following steps:depositing successive layers onto the interior of the tube with the refractive index increasing from the first, larger diameter layer to the central layer, each layer being formed from gases which react with each other inside said tube, and varying the proportions of said gases from one layer to another to vary said index,wherein said gases are introduced into said tube at a velocity v such that the radial index profile is homogenized in the longitudinal direction, andwherein said velocity v at which said gases are introduced increases with each layer from a first to last layer fabricated. Process for fabricating an optical fiber having a maximum refractive index along with the axis of said fiber and a lower refractive index at its periphery, said process including the following steps:depositing successive layers on the interior of a tube so that the refractive index of the first, larger diameter layers is lower than the refractive index of the central layers, each layer being formed from gases that react with each other within said tube, and varying the proportions of said gases to vary said index,wherein a velocity v at which said gases are introduced into said tube is chosen to homogenize the radial index profile in the longitudinal direction, andwherein said velocity v is substantially the same for fabrication of all said layers. Process for fabricating an optical fiber having a maximum refractive index along with the axis of said fiber and a lower refractive index at its periphery, said process including the following steps:depositing successive layers on the interior of a tube so that the refractive index of the first, larger diameter layers is lower than the refractive index of the central layers, each layer being formed from gases that react with each other within said tube, and varying the proportions of said gases to vary said index,wherein a velocity v at which said gases are introduced into said tube is chosen to homogenize the radial index profile in the longitudinal direction, andwherein said velocity v at which said gases are introduced increases with each layer from a first to last layer fabricated.
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이 특허에 인용된 특허 (5)
Hicks ; Jr. John W. (Northboro MA), Method for fabricating optical fiber preforms.
Michie Michael M. (Alpharetta GA) Nguyen Quang D. (Lilburn GA) Ritger Albert J. (Lawrenceville GA), Methods of making optical fiber and products produced thereby.
Mazzarese, David J; Oulundsen, George E; Sledziewski, Jr., Joseph T, Method of modifying the index profile of an optical fiber preform in the longitudinal direction.
Galvanauskas, Almantas; Harter, Donald J.; Fermann, Martin E.; Raksi, Ferenc, Microchip-Yb fiber hybrid optical amplifier for micro-machining and marking.
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