Optical tuning of magnetron using leaky light structure
US6259208A · kind A · utility
Inventor
Key dates
| Filing date | Mar 17, 1997 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Mar 17, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2225/587
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An optically tuned magnetron oscillator employs materials whose electrodynamic properties are altered by the absorption of light. A probe constructed from a leaky dielectric light guide coated with a photoconductive material is inserted into each of the magnetron's cavities. When light is injected into the light guide, it leaks into the coating where it is absorbed, creating free charge carriers whose presence alters the dielectric properties of the material, thereby perturbing the resonant frequency of the cavity. The frequency can be controlled by varying the amount of light injected into each of the optical probes. When no light is present, the resonant frequency of the magnetron cavity will be at one extreme of its operating band; when the light is at full intensity, the change in the properties of the probe will be maximum as will be the change in the resonant frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.