Device for producing or amplifying coherent radiation
US4631731A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1984 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Feb 3, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/0959
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device for producing or amplifying coherent radiation includes a semiconductor device such as a laser. By means of electrons of high energy produced by a semiconductor cathode of the device, population inversion is obtained in an active layer of the laser structure. In this manner, laser action is obtained, which offers advantages, especially with II-VI materials which emit radiation of a wavelength shorter than the usual III-V materials, and which do not permit the desired population inversion to be obtained in the same manner as in III-V materials, by means of current injection across a pn junction. The semiconductor cathode and the laser structure can be arranged in mutual separation in a vacuum tube or be realized in one semiconductor body. The short-wave laser is especially advantageous for CD,DOR and VLP applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.