公开(公告)号：EP1338102B1

公开(公告)日：2012-11-07

申请号：EP01972462.4

申请日：2001-09-07

申请人： Prysmian S.p.A.

发明人： OLIVETI, Guido ,  POMARICO, Francesco, Ivan ,  ROBA, Giacomo ,  SARCHI, Davide ,  SARTORI, Francesco

IPC分类号： G02B6/00

CPC分类号： G02B6/02276 ,  G02B6/02266 ,  G02B6/0281 ,  G02B6/0288 ,  G02B6/03611 ,  G02B6/2552 ,  G02B6/29377

公开(公告)号：EP2350720A1

公开(公告)日：2011-08-03

申请号：EP08875298.5

申请日：2008-11-07

申请人： Prysmian S.p.A.

发明人： RUZZIER, Marco ,  SARTORI, Francesco ,  CONSONNI, Enrico ,  CUOMO, Daniele

IPC分类号： G02B6/44 ,  G02B6/02

CPC分类号： G02B6/449 ,  G02B6/4413 ,  G02B6/4434

摘要： A bend-insensitive optical cable for transmitting optical signals is disclosed, the optical cable having a length, L
TOT , extending from an input end adapted to receive the optical signals to an output end and comprising at least one single-mode optical fiber having a cable cut-off wavelength, (λ
cc )
A, of from 1290 nm to 1650 nm and preferably of from 1320 to 1650 nm. The at least one optical fiber is helically twisted around a longitudinal axis (Z) with a twisting pitch, P, for a twisted length, L, extending along at least a portion of the length, L
TOT , of the optical cable, wherein the twisted length and the twisting pitch are selected such that the optical cable exhibits a measured cut-off wavelength equal or lower than 1260 nm. Preferably, the at least one fiber has a mode-field diameter (MFD) of from 8.6 μm to 9.5 μm. According to a preferred embodiment, the optical cable (10) comprises two optical fibers (11,12) twisted together along the longitudinal axis (Z), each of the two optical fibers having a (λ
cc )
A of from 1290 nm to 1650 nm.