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1. (WO2018022870) LOW LOSS SINGLE MODE FIBER WITH CHLORINE DOPED CORE

Pub. No.:    WO/2018/022870    International Application No.:    PCT/US2017/044155
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Fri Jul 28 01:59:59 CEST 2017
IPC: G02B 6/028
Applicants: CORNING INCORPORATED
Inventors: BOOKBINDER, Dana Craig
LI, Ming-Jun
MISHRA, Snigdharaj Kumar
TANDON, Pushkar
Title: LOW LOSS SINGLE MODE FIBER WITH CHLORINE DOPED CORE
Abstract:
An optical fiber comprising: (i) a chlorine doped silica based core comprising a core alpha (α) > 10, and maximum refractive index delta Δ1max % and Cl concentration > 1 wt %; (ii) a cladding surrounding the core, the cladding comprising: (a) an inner cladding region adjacent to and in contact with the core and having a refractive index delta Δ2 and a minimum refractive index delta Δ2min such that Δ2min < Δ1max, the inner cladding region comprising fluorine doped silica and the refractive index delta Δ2 with region that decreases with radial position, and (b) an outer cladding region surrounding the inner cladding region and having refractive index delta Δ3, such that Δ2min < Δ3. The fiber has mode field diameter MFD at 1310 nm of ≥ 9 microns, a cable cutoff of ≤ 1260 nm, zero dispersion wavelength of 1300 nm ≤ zero dispersion wavelength ≤ 1324 nm and bend loss at 1550 nm for a 20 mm mandrel of less than 0.5 dB/turn.