公开(公告)号：JP2002226226A

公开(公告)日：2002-08-14

申请号：JP2002000109

申请日：2002-01-04

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DE HAZAN YORAM ,  MAC CHESNEY JOHN BURNETTE ,  STOCKERT THOMAS EDWARD ,  CHRISTOPHER ALAN WHITE

IPC: G02B6/00 ,  C03B37/014

Abstract: PROBLEM TO BE SOLVED: To provide a new fluorine doping method. SOLUTION: Treating time required for fluorine doping of a porous silica body to produce a fluorine doped preform for producing an optical fiber having lowered refractive index is shortened by the division of a doping step into a preliminary heaping step for heaping 'excess amount' of fluorine on silica particles and a drive-in step for diffusing fluorine atom in the silica particles. As the drive-in step is assembled easily with a sintering step or a consolidating step, doping treatment efficiency is increased furthermore.

公开(公告)号：DE60107375T2

公开(公告)日：2005-11-24

申请号：DE60107375

申请日：2001-08-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DE HAZAN YORAM ,  MAC CHESNEY JOHN BURNETTE ,  STOCKERT THOMAS EDWARD ,  WHITE CHRISTOPHER ALAN

IPC: G02B6/00 ,  C03B37/014

Abstract: The process time required for fluorine doping of porous silica bodies to produce fluorine doped preforms for the manufacture of depressed index optical fibers is reduced by separating the doping step into a predeposit step, where "excess" fluorine is deposited on the silica particles within the porous silica body, and a drive-in step where atomic fluorine is distributed into the silica particles. The drive-in step is conveniently combined with the sintering or consolidation step to further enhance the efficiency of the doping process and is carried out at a temperature above 1300 DEG C in an atmosphere devoid of fluorine.

公开(公告)号：DE60107375D1

公开(公告)日：2004-12-30

申请号：DE60107375

申请日：2001-08-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DE HAZAN YORAM ,  MAC CHESNEY JOHN BURNETTE ,  STOCKERT THOMAS EDWARD ,  WHITE CHRISTOPHER ALAN

IPC: G02B6/00 ,  C03B37/014

Abstract: The process time required for fluorine doping of porous silica bodies to produce fluorine doped preforms for the manufacture of depressed index optical fibers is reduced by separating the doping step into a predeposit step, where "excess" fluorine is deposited on the silica particles within the porous silica body, and a drive-in step where atomic fluorine is distributed into the silica particles. The drive-in step is conveniently combined with the sintering or consolidation step to further enhance the efficiency of the doping process and is carried out at a temperature above 1300 DEG C in an atmosphere devoid of fluorine.