Method of annealing a fiber within a coiled tube to thereby make a fiber coil for a Faraday-effect current-sensor
US5645622A · kind A · utility
3Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1995 |
| Grant date | Jul 8, 1997 |
| Priority date | — |
| Expiry date | Mar 21, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/3684
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Silica tubes and sleeves are used to protect fusion splices between the ends of the fiber coil and polarizing fibers. Use of silica for most of the subassembly components matches the coefficients of thermal expansion of the subassembly to that of the fiber coil, and also allows the coil to be annealed at extremely high temperatures. Annealing yields fiber coils of lowered birefringence, particularly when used with spun fibers. Ferrules are used to adjust the angular orientation of the fibers with respect to their planes of polarization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.