Precision wavelength control for automated fiber optic Bragg grating writing
US5898804A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1997 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Jun 9, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02133
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a computer controlled apparatus and method for producing high quality fiber optic Bragg gratings. According to the invention, the apparatus (10) preferably includes a laser (12) for generating an ultraviolet beam (18), a rotatable scrapper mirror (32) disposed downstream of the laser (12) for receiving the beam (18) and an optical fiber (48) disposed adjacent an edge (84) of the mirror (32) for receiving a high fringe frequency interferrogram (86) formed by the mirror (32). The mirror (32) is coupled to a rotation stage (14) for rotating the mirror (32) about a pre-selected pivot point (36) relative to the angle of incidence of the beam (18) to vary the Bragg wavelength at the fiber core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.