公开(公告)号：JPH10139463A

公开(公告)日：1998-05-26

申请号：JP25086197

申请日：1997-09-16

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CLAYTON JANE BILECKY ,  ESKILDSEN LARS ERIK ,  HANSEN PER BANG ,  HEADLEY CLIFFORD ,  REED WILLIAM ALFRED

IPC: G02B6/00 ,  C03B37/025 ,  C03B37/027 ,  G02B6/02

Abstract: PROBLEM TO BE SOLVED: To obtain an optical fiber reducing a loss caused by a stimulated Brillouin scattering by preparing an optical fiber perform having a Ge-doped core, heating a part thereof and performing a draw-forming at a specific drawing force. SOLUTION: This optical fiber is produced by preparing a perform as a glass rod having 1m length and 20-200mm outer diameter and an inside core as a high purity and a low loss silicate containing Ge, having 1-5mm diameter, and an outside clad layer as a glass layer having a lower refractive index than that of the inside core. The end part of the perform is heated at a high temperature and the optical fiber is drawn. The drawing force is changed in accordance with shapes of a sine wave, a triangular wave or a trapezoidal wave along the lengthwise direction of the fiber, and a minimum and a maximum forces therefor are 10-50g and 150-150g respectively. A preferable wave length of the sine wave is 3-30km, a preferable length of the base of the triangular wave is 3-30km, that of the base (longer side) of the trapezoidal wave is 3-15km, and that of the upside (shorter side) thereof is 1-13km.

公开(公告)号：DE69701611T2

公开(公告)日：2000-08-31

申请号：DE69701611

申请日：1997-10-21

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CLAYTON JANE BILECKY ,  ESKILDSEN LARS ERIK ,  HANSEN PER BANG ,  HEADLEY CLIFFORD ,  REED WILLIAM ALFRED

IPC: G02B6/00 ,  C03B37/025 ,  C03B37/027 ,  G02B6/02 ,  G02B6/16

Abstract: A Ge-core-doped optical fiber having reduced loss due to stimulated Brillouin scattering (SBS) is made by modulating the tension applied to the fiber during drawing from a preform. The draw tension is modulated with length between a low range of 10-50 g and a high in the range of 150-250 g. The result is SBS suppression with no significant change to end - to end fiber loss or dispersion factors.

公开(公告)号：DE69701611D1

公开(公告)日：2000-05-11

申请号：DE69701611

申请日：1997-10-21

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CLAYTON JANE BILECKY ,  ESKILDSEN LARS ERIK ,  HANSEN PER BANG ,  HEADLEY CLIFFORD ,  REED WILLIAM ALFRED

IPC: G02B6/00 ,  C03B37/025 ,  C03B37/027 ,  G02B6/02 ,  G02B6/16

Abstract: A Ge-core-doped optical fiber having reduced loss due to stimulated Brillouin scattering (SBS) is made by modulating the tension applied to the fiber during drawing from a preform. The draw tension is modulated with length between a low range of 10-50 g and a high in the range of 150-250 g. The result is SBS suppression with no significant change to end - to end fiber loss or dispersion factors.