Title:
【発明の名称】光フアイバ用母材の製造方法
Document Type and Number:
Japanese Patent JP2751176
Kind Code:
B2
Abstract:
PURPOSE:To obtain the title matrix at a high accumulation rate in high yield through e.g. the VAD process, by using, as the multitubular burner, a double flame-forming burner of specified structure and by controlling glass material flow. CONSTITUTION:As the multitubular burner, a double flame-forming burner comprising (A) inside flame-forming section with flame-forming multiblowout boats 2-4 located on the outer periphery of a material blowout central boat 1, and (B) outside flame-forming section made up of flame-forming multi-blowout boats 5-8 arranged on the outer periphery of the section A is used. Thence, a gaseous glass material is fed into the flame of said burner under such conditions as to satisfy the relationship: 0.4Q<=LXd<2=0.6Q [where, L(mm) is difference in level between the respective tips of the sections A and B; d(mm) is inner diameter of the boat 1; Q(cc/min) is glass material flow] to carry out flame hydrolysis and accumulated the granular glass thus synthesized, thereby obtaining the objective porous matrix for optical fiber.
Inventors:
DANZUKA TOSHIO
ITO MASUMI
YOKOTA HIROSHI
TAKAGI MASAHIRO
ITO MASUMI
YOKOTA HIROSHI
TAKAGI MASAHIRO
Application Number:
JP2397588A
Publication Date:
May 18, 1998
Filing Date:
February 05, 1988
Export Citation:
Assignee:
SUMITOMO DENKI KOGYO KK
International Classes:
B29C45/50; B29C45/56; G02B6/00; B29C45/70; B29C45/76; C03B37/014; C03B37/018; G05B19/414; (IPC1-7): C03B37/018; G02B6/00
Domestic Patent References:
| JP61186238A | ||||
| JP61270226A | ||||
| JP6287428A | ||||
| JP61186239A |
Attorney, Agent or Firm:
Akira Uchida (3 outside)