Global Patent Index - EP 1057057 A1

EP 1057057 A1 2000-12-06 - OPTICAL DEVICE

Title (en)

OPTICAL DEVICE

Title (de)

OPTISCHE VORRICHTUNG

Title (fr)

DISPOSITIF OPTIQUE

Publication

EP 1057057 A1 (EN)

Application

EP 99905105 A

Priority

  • GB 9900529 W
  • GB 9803709 A

Abstract (en)

[origin: WO9942871A1] An optical device comprises a multicore optical fibre having m circularly symmetric cores where m>1, the multicore optical fibre having a region of steadily narrowing cross-sectional area. This invention also provides an optical coupler comprising a multicore optical fibre having m circularly symmetric cores optically coupled at a narrowed coupling region to another optical fibre having n cores, where m and n are positive integers and m is greater than 1, the multicore optical fibre having regions of steadily varying cross-sectional area linking the narrowed coupling region to non-narrowed regions of the multicore optical fibre.

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

G02B 6/287; G02B 6/293; G02B 6/34

IPC 8 full level (invention and additional information)

G02B 6/02 (2006.01); G02B 6/255 (2006.01); G02B 6/28 (2006.01); G02B 6/287 (2006.01); G02B 6/293 (2006.01); G02B 6/34 (2006.01)

CPC (invention and additional information)

G02B 6/02042 (2013.01); G02B 6/03605 (2013.01); G02B 6/03688 (2013.01); G02B 6/2552 (2013.01); G02B 6/2835 (2013.01); G02B 6/29317 (2013.01); G02B 6/29383 (2013.01)

Citation (search report)

See references of WO 9942871A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

WO 9942871 A1 19990826; AU 2540099 A 19990906; CA 2320769 A1 19990826; EP 1057057 A1 20001206; GB 9803709 D0 19980415; JP 2002504703 A 20020212

INPADOC legal status


2003-03-12 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020903

2001-03-14 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010130

2000-12-06 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000915

2000-12-06 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT