Method and apparatus for forming a Bragg grating with high intensity light
US6249624A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1998 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Dec 4, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/02161
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus for forming a Bragg grating using a high intensity light includes a pair of focussed writing beams 26,34 that simultaneously intersect and interfere with each other at a region 30 of a photosensitive optical fiber 28. The beams 26,34 have a high intensity (e.g., at least about 500 mjoules/cm.sup.2) and pass through an interface medium 50 that is substantially transparent to the wavelength of the writing beams 26,34. The medium has a thickness T set such that the intensity of the beams at the surface 56 of the medium 50 is below an surface damage intensity such that no ablations occur on the fiber 28 or the surface 56 when the fiber 28 is exposed to the beams 26,34.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.