公开(公告)号：EP2252905A1

公开(公告)日：2010-11-24

申请号：EP09704391.3

申请日：2009-01-15

申请人： Corning Incorporated

发明人： BENNETT, Kevin, W ,  KOH, Joohyun

IPC分类号： G02B6/02 ,  G01K11/32

CPC分类号： G02B6/02395 ,  G01K2011/324 ,  G02B6/0288

摘要： According to one example of the invention an optical fiber comprises: (i) a core (12) consisting of Al doped silica having a first index of refraction n1; (ii) at least one silica based cladding (14) surrounding the core and having a second index of refraction n2, such that n1>n2; (iii) a hermetic carbon based coating (16) surrounding said cladding, said hermetic coating being 300nm -1000 nm thick; and (iv) a second coating (18) surrounding said hermetic coating, said second coating being 5 μm to 80 μm thick.