Small diameter low attenuation optical fiber
US11181686B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2019 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Apr 23, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02214
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical fiber comprising: a core having an outer radius r1; a cladding having an outer radius r4≤31 microns; a primary coating surrounding the cladding having an outer radius r5, a thickness tp>10 microns, in situ modulus EP of 0.5 MPa or less, and a spring constant χP<1 MPa, where χP=2EP r4/tP; and a secondary coating surrounding said primary coating, the secondary coating having an outer radius r6, a thickness tS=r6-r5, in situ modulus ES of 1200 MPa or greater; tS greater than 9.5 microns, wherein r6 is 50 to 67.5 microns. The fiber has a mode field diameter MFD greater than 8.2 microns at 1310 nm; a fiber cutoff wavelength of less than 1310 nm; and a bend loss at a wavelength of 1550 nm, when wrapped around a mandrel having a diameter of 10 mm, of less than 1.0 dB/turn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.