US 11,719,878 B2
Ultra reduced diameter optical fibre
Malleswarrao Lanke, Gurgaon (IN); Anand Pandey, Gurgaon (IN); Anant Pawale, Gurgaon (IN); and Milind Patil, Gurgaon (IN)
Filed by Sterlite Technologies Limited, Gurgaon (IN)
Filed on Oct. 30, 2020, as Appl. No. 17/85,777.
Claims priority of application No. 201911043933 (IN), filed on Oct. 30, 2019.
Prior Publication US 2021/0132290 A1, May 6, 2021
Int. Cl. G02B 6/02 (2006.01); C03C 25/1065 (2018.01)
CPC G02B 6/02395 (2013.01) [G02B 6/02 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An optical fibre comprising:
a glass core;
a glass cladding that surrounds the glass core has a cladding refractive index; and
a coating over the glass cladding, wherein the coating has a coating refractive index, wherein absolute difference between the cladding refractive index and the coating refractive index is greater than 0.01, wherein the coating includes:
a primary coating layer that surrounds the glass cladding; and
a secondary coating layer that surrounds the primary coating layer, wherein the secondary coating layer has a secondary in-situ modulus greater than or equal to 1.2 giga pascal, wherein the optical fibre has a diameter of 160 to 180 micrometers, wherein the secondary coating layer has a secondary coating thickness in a range of 2.5 to 17.5 micrometers,
wherein the optical fibre has a zero dispersion slope of up to 0.092 picosecond/(nanometer2.kilometer).