公开(公告)号：CA1101216A

公开(公告)日：1981-05-19

申请号：CA288970

申请日：1977-10-18

Applicant: THOMSON CSF

Inventor： DE PANAFIEU ARMAND ,  VILLARD MICHEL ,  BAYLAC CHRISTIANE ,  FAURE MICHEL

IPC: C03B37/014 ,  C03B8/00 ,  C03B25/00 ,  C03B37/016 ,  C03C3/064 ,  C03C3/089 ,  C03C3/091 ,  C03C11/00 ,  C03C13/04 ,  C03C23/00 ,  G02B6/00 ,  C03B37/02

Abstract: A PROCESS FOR THE MANUFACTURE OF OPTICAL FIBERS WITH A RADIAL REFRACTIVE INDEX of the disclosure A process yielding a glass blank in the form of a rod intended for drawing an optical fiber of the kind of selffocussing fiber i.e. having a radial refractive index gradient, having features (substantially transparency or transmission efficiency) lower than those of the fibers intended for long distance communication but sufficient for middle distance transmission, and which exhibits a lower cost than known processes. In a first stage a phase separation yields a "hard" phase (rich in silicon) and a "soft" phase (poor in silicon and rich in impurities) due to the drawing of a rod from a bath of molten glass through a cooling system having a strong temperature gradient and creating a radial refractive index gradient. In a second stage the soft phase is leached, eliminating the impurities contained in the soft phase but keeping safe the radial gradient. In a third stage a consolidation treatment is a pure annealing treatment rendering the hard phase more homogeneous.

公开(公告)号：DE2746949A1

公开(公告)日：1978-04-20

申请号：DE2746949

申请日：1977-10-19

Applicant: THOMSON CSF

Inventor： PANAFIEU ARMAND DE ,  VILLARD MICHEL ,  BAYLAC CHRISTIANE ,  FAURE MICHEL

IPC: C03B37/014 ,  C03B8/00 ,  C03B25/00 ,  C03B37/016 ,  C03C3/064 ,  C03C3/089 ,  C03C3/091 ,  C03C11/00 ,  C03C13/04 ,  C03C23/00 ,  G02B6/00 ,  C03B37/00 ,  C03C13/00 ,  G02B5/14

Abstract: A process yielding a glass blank in the form of a rod intended for drawing an optical fiber of the kind of self-focussing fiber i.e. having a radial refractive index gradient, having features (substantially transparency or transmission efficiency) lower than those of the fibers intended for long distance communication but sufficient for middle distance transmission, and which exhibits a lower cost than known processes. In a first stage a phase separation yields a "hard" phase (rich in silicon) and a "soft" phase (poor in silicon and rich in impurities) due to the drawing of a rod from a bath of molten glass through a cooling system having a strong temperature gradient and creating a radial refractive index gradient. In a second stage the soft phase is leached, eliminating the impurities contained in the soft phase but keeping safe the radial gradient. In a third stage a consolidation treatment is a pure annealing treatment rendering the hard phase more homogeneous.

公开(公告)号：FR2427621A1

公开(公告)日：1979-12-28

申请号：FR7816035

申请日：1978-05-30

Applicant: THOMSON CSF

Inventor： PANAFIEU ARNAUD DE ,  BAYLAC CHRISTIANE ,  NEMAUD YVES ,  TURPIN MARC ,  FAURE MICHEL

IPC: C03B37/014 ,  C03C3/089 ,  C03C13/04 ,  C03C15/00 ,  C03C23/00 ,  G02B6/00 ,  G02B6/028 ,  G02B5/14 ,  C03B23/00

Abstract: A process for the manufacture of a glass blank in the form of a rod from which the optical fibre is drawn, said blank being produced starting from a molten bath of glass. A first stage of the process comprises melting a mixture of starting materials having a higher impurity content (

公开(公告)号：DE2961122D1

公开(公告)日：1981-12-10

申请号：DE2961122

申请日：1979-05-16

Applicant: THOMSON CSF

Inventor： DE PANAFIEU ARNAUD ,  BAYLAC CHRISTIANE ,  NEMAUD YVES ,  TURPIN MARC ,  FAURE MICHEL

IPC: C03B37/014 ,  C03C3/089 ,  C03C13/04 ,  C03C15/00 ,  C03C23/00 ,  G02B6/00 ,  G02B6/028 ,  C03B37/02 ,  C03C13/00 ,  G02B5/14

Abstract: A process for the manufacture of a glass blank in the form of a rod from which the optical fibre is drawn, said blank being produced starting from a molten bath of glass. A first stage of the process comprises melting a mixture of starting materials having a higher impurity content (

公开(公告)号：FR2368444A1

公开(公告)日：1978-05-19

申请号：FR7631355

申请日：1976-10-19

Applicant: THOMSON CSF

Inventor： PANAFIEU ARNAUD DE ,  VILLARD MICHEL ,  BAYLAC CHRISTIANE ,  FAURE MICHEL

IPC: C03B37/014 ,  C03B8/00 ,  C03B25/00 ,  C03B37/016 ,  C03C3/064 ,  C03C3/089 ,  C03C3/091 ,  C03C11/00 ,  C03C13/04 ,  C03C23/00 ,  G02B6/00 ,  C03B37/02 ,  C03B32/00 ,  C03C3/08 ,  G02B5/14 ,  H04B9/00

Abstract: A process yielding a glass blank in the form of a rod intended for drawing an optical fiber of the kind of self-focussing fiber i.e. having a radial refractive index gradient, having features (substantially transparency or transmission efficiency) lower than those of the fibers intended for long distance communication but sufficient for middle distance transmission, and which exhibits a lower cost than known processes. In a first stage a phase separation yields a "hard" phase (rich in silicon) and a "soft" phase (poor in silicon and rich in impurities) due to the drawing of a rod from a bath of molten glass through a cooling system having a strong temperature gradient and creating a radial refractive index gradient. In a second stage the soft phase is leached, eliminating the impurities contained in the soft phase but keeping safe the radial gradient. In a third stage a consolidation treatment is a pure annealing treatment rendering the hard phase more homogeneous.