Method for restoring photosensitivity in hydrogen or deuterium loaded large diameter optical waveguide
US7269316B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2006 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | May 11, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02123
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a new and unique method for increasing the photosensitivity of a large diameter optical waveguide having a cross-section of at least about 0.3 millimeters. The method features loading the large diameter optical waveguide with a photosensitizing gas at a pressure at least about 4000 pounds per square inch (PSI) at a temperature of at least about 250° Celsius. The photosensitizing gas may be hydrogen, Deuterium or other suitable gas. The method also includes the step of using a particular large diameter optical waveguide having a core more than 1000 microns from the surface thereof.The method may be used as part of a process for writing a Bragg grating in an inner core or a cladding of the large diameter optical waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.