Bend insensitive single mode fiber
US8750664B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2009 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Feb 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/03627
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention discloses a bend insensitive single mode fiber, which is composed by a bare glass fiber with a round cross section and two resin protective layers with circular cross sections surrounding the outer of the bare glass fiber. It is characterized in that the bare glass fiber is composed by a core layer with a round cross section and two claddings with circular cross sections. The refractive index of the core layer is higher than the index of the two claddings and the refractive index difference between the core layer and the first cladding is larger than the difference between the first and second claddings. The second cladding is made of pure SiO2. The refractive index profile of the core layer follows a power function, and the refractive index profile of the two claddings follow a ladder-type distribution. The loss of the invented fiber is insensitive to the bending of the fiber, which meets the requirements of ITU.T G.657.A and G.657.B standards, respectively. It is applicable to the Fiber To The Home (FTTH) and other local area network and the access network systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.