FIELD: physics.
SUBSTANCE: optical fibre comprises a core and a shell surrounding an outer circumference of the core, in which the first relative refractive index difference Δ1a is greater than 0. The second relative refractive index difference Δ1b is greater than 0, the first relative refractive index difference Δ1a is greater than the second relative refractive index difference Δ1b. In addition, the first relative refractive index difference Δ1a and the second relative refractive index difference Δ1b satisfy the following ratio: 0.20≤(Δ1a-Δ1b)/Δ1a≤0.88, and the refractive index profile Δ for the core in the whole area 0≤r≤r1 as a function Δ(r) of the distance r from the center of the core in the radial direction is given by: Δ(r)=Δ1a-(Δ1a-Δ1b)r/r1, where r1 is the radius of the core.
EFFECT: reduction of excessive bending losses occurring during the bending of the optical fibre.
28 cl, 1 tbl, 15 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| LOW-LOSS AT BENDS OPTICAL FIBER | 2017 |
|
RU2727854C2 |
| FIBRE OF HIGH EFFICIENT AREA WITH CORE NOT CONTAINING Ge | 2011 |
|
RU2550752C2 |
| OPTICAL FIBRE WITH HIGH CONTENT OF CHLORINE AND LOW COEFFICIENT OF ATTENUATION | 2015 |
|
RU2706849C2 |
| SINGLE-MODE FIBRE WITH SHALLOW GROOVE, INSENSITIVE TO BENDING LOSSES, AND CORRESPONDING OPTICAL SYSTEM | 2017 |
|
RU2755736C1 |
| LOW DIAMETER OPTICAL FIBER | 2014 |
|
RU2656277C2 |
| OPTICAL FIBRE HAVING LOW BEND LOSSES | 2011 |
|
RU2567468C2 |
| LOW BENDING LOSS OPTICAL FIBRE | 2012 |
|
RU2614033C2 |
| BEND-INSENSITIVE SINGLE-MODE OPTICAL FIBRE | 2009 |
|
RU2489740C2 |
| BROMINE-DOPED OPTICAL FIBER | 2016 |
|
RU2736023C2 |
| OPTICAL FIBRE WITH LOW FLEXURAL LOSSES | 2010 |
|
RU2537086C2 |
