Cable with optical fibers retained in a sheath
US6334015A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 2001 |
| Grant date | Dec 25, 2001 |
| Priority date | — |
| Expiry date | May 4, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/441
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In order to prevent microcurvatures in the optical fibers when the cable is subjected to temperature variations in the range from approximately -40.degree. C. to approximately +85.degree. C., a cable with N optical fibers (FO) each having a core (1) and a coating (2) with coefficients of thermal expansion/compression .alpha.1 and .alpha.2, Young's modulus in traction E1 and E2 and sections S1 and S2 comprises a retaining sheath (3) enveloping the optical fibers buried in a filling material (4) having a coefficient of thermal expansion/compression .alpha.4, Young's modulus in traction E4 and section S4. The sheath (3) satisfies the condition: (.alpha.3.E3.S3).ltoreq.[(.alpha.1.E1.S1)+(.alpha.2.E2.S2)](N/ 14)+(.alpha.4.E.4.S4) in which .alpha.3, E3 and S3 are respectively the coefficient of thermal expansion/compression, the Young's modulus in traction and the section of the sheath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.