Method for manufacturing a FBG having improved performances and an annealing-trimming apparatus for making the same
US6956994B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2003 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | May 5, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/1857
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for manufacturing a FBG having improved performances and an annealing-trimming apparatus for making the same are provided. The trimming and the annealing steps are advantageously combined into a single process in order to efficiently fabricate complex FBG filters with improved performance. The method comprises the steps of UV-writing a FBG in an optical fiber prior to annealing-trimming characteristics of the FBG by performing the sub-steps of monitoring characteristic data of the FBG while generating a controlled complex temperature profile along the FBG with a heating means according to the characteristic data for providing an accurate controlled annealing process of the FBG, thereby providing an accurate trimming thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.