Torch for fabricating optical fiber preform
AssigneeFurukawa Electric Co., Ltd.
InventorsMasatoshi Mikami, Kunihiro Matsubara
Life of this patent
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Abstract
A torch for fabricating an optical fiber perform which has a plurality of raw gas injection passages at the center of the torch, a plurality of small-diameter combustion supporting gas injection passages independent of each other and disposed to surround the raw gas injection passages on the outer periphery of the raw gas injection passages disposed at the center of the torch, and an annular combustible gas injection passage disposed around the small-diameter combustion supporting gas injection passages. Thus, the torch can stably manufacture porous glass preforms.
Claims30
A torch for fabricating an optical fiber preform comprising:
- means for flowing raw gas through said torch comprising at least one raw gas injection passage at the center of said torch;
- means for flowing combustion supporting gas through said torch comprising a plurality of smalldiameter, combustion supporting gas injection passages independent of each other and disposed to surround said raw gas injection passage;
- and
- means for flowing a combustible gas through said torch comprising an annular combustible gas injection passage disposed around said small-diameter combustion supporting gas injection passages.
A torch for fabricating an optical fiber preform comprising:
- means for flowing raw gas through said torch comprising at least one raw gas injection passage at the center of said torch;
- means for flowing combustion supporting gas through said torch comprising a plurality of small-diameter combustion supporting gas injection passages independent of each other and disposed to surround said raw gas injection passages;
- means for flowing a combustible gas through said torch comprising an annular combustible gas injection passage disposed around said small-diameter combustion supporting gas injection passages;
- and
- further means for supplying a combustion supporting gas comprising an annular combustion supporting gas injection passage provided about the outer periphery of said annular combustible gas injection passage.
A torch for fabricating an optical fiber preform comprising:
- means for flowing raw gas through said torch comprising at least one raw gas injection passage at the center of said torch;
- means for flowing a sealing gas through said torch comprising a first annular sealing gas injection passage provided on the outer periphery of said raw gas injection passage;
- means for flowing a combustion supporting gas through said torch comprising a plurality of small-diameter combustion supporting gas injection passages independent of each other and disposed to surround said annular sealing gas injection passage;
- means for flowing a combustible gas through said torch comprising an annular combustible gas injection passage disposed around said small-diameter combustion supporting gas injection passages;
- further means for flowing a sealing gas through said torch comprising a second sealing gas injection passage about said annular combustible gas injection passage;
- and
- further means for flowing a combustion supporting gas through said torch comprising an annular combustion supporting gas injection passage provided about said second sealing gas injection passage.
Dependencies are inferred from the claim text.