Apodization method for a bragg grating
US6868208B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2001 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | Aug 29, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02152
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides a method of photoinducing a Bragg grating in an optical fiber (300) or a waveguide, in which a selected zone of the fiber (300) or waveguide is subjected to a step of being exposed with a source beam (120) using a mirror (200) in such a manner as to fold a portion (122) of the source beam (120) as reflected by the mirror (200) onto a portion (224) of the source beam that is not reflected by the mirror, thereby obtaining a diffraction grating in the fiber (300) or waveguide, the method being characterized in that an additional exposure step is performed on said portion of the fiber (300) or waveguide, and in that relative displacement is imparted between the two exposure steps to elements selected from the beam (120), the fiber (300) or waveguide, and the mirror (200) in such a manner as to cause a same portion of the beam (120) used for photoinduction in both exposure steps to be reflected by the mirror (200) in one of the steps and not reflected by the mirror (200) in the other step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.