Optical barriers, waveguides, and methods for fabricating barriers and waveguides for use in harsh environments
US8852695B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2012 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Jan 4, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/03666
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Electromagnetic radiation barriers and waveguides, including barriers and waveguides for light, are disclosed. The barriers and waveguides are fabricated by directing charged particles, for example, ions, into crystalline substrates, for example, single-crystal sapphire substrates, to modify the crystal structure and produce a region of varying refractive index. These substrates are then heated to temperatures greater than 200 degrees C. to stabilize the modified crystal structure and provide the barrier to electromagnetic radiation. Since the treatment stabilizes the crystal structure at elevated temperature, for example, above 500 degrees C. or above 1000 degrees C., the barriers and waveguides disclosed are uniquely adapted for use in detecting conditions in harsh environments, for example, at greater than 200 degrees C. Sensors, systems for using sensors, and methods for fabricating barriers and waveguides are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.