Global Patent Index - EP 1161697 A1

EP 1161697 A1 2001-12-12 - LARGE EFFECTIVE AREA WAVEGUIDE FIBER

Title (en)

LARGE EFFECTIVE AREA WAVEGUIDE FIBER

Title (de)

WELLENLEITERFASER MIT GROSSER EFFEKTIVER FLÄCHE

Title (fr)

FIBRE DE GUIDE D'ONDE A SURFACE EFFICACE IMPORTANTE

Publication

EP 1161697 A1 (EN)

Application

EP 00914851 A

Priority

  • US 0005948 W
  • US 12386299 P

Abstract (en)

[origin: WO0055661A1] Disclosed is a single mode optical waveguide fiber having a segmented core in which the central segment is a void (16). The shape and radial extent of the core segments are selected to provide a low dispersion slope together with large effective area and good bend resistance. Embodiments of the refractive index profiles in accord with the invention are shown having two or three annular segments (2, 6, 8) surrounding the central void. The presence of the void provides the benefits of a negative relative index located centrally in the core region without the process difficulties associated with the use of dopants that decrease the refractive index of the waveguide fiber.

IPC 1-7 (main, further and additional classification)

G02B 6/20; G02B 6/22

IPC 8 full level (invention and additional information)

G02B 6/032 (2006.01); G02B 6/036 (2006.01)

CPC (invention and additional information)

G02B 6/03644 (2013.01); G02B 6/02014 (2013.01); G02B 6/0228 (2013.01); G02B 6/032 (2013.01); G02B 6/03611 (2013.01)

Citation (search report)

See references of WO 0055661A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0055661 A1 20000921; AU 3618700 A 20001004; BR 0008648 A 20011226; CA 2367275 A1 20000921; CN 1344376 A 20020410; EP 1161697 A1 20011212; ID 29803 A 20011011; JP 2003517626 A 20030527; KR 20010113736 A 20011228

INPADOC legal status


2005-04-13 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20041001

2001-12-12 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010718

2001-12-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-12-12 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI