Diode laser pumped co-doped laser
US4701928A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1985 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Oct 2, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/0405
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A miniature solid state near room temperature laser includes a laser crystal doped with a laser ion and an absorber ion. The absorber ion absorbs pumping radiation derived from the output of a laser diode and transfers the absorbed energy to the laser ion for inverting the population of the desired energy transition levels to produce an eyesafe output beam with wavelengths greater than 1.4 microns. In a preferred embodiment, the host crystal is YAG and it is co-doped with Ho as the laser ion and Er as the absorber ion. A small concentration of Tm ion may be doped into the crystal to enhance pumping efficiency. Improved efficiency can be obtained by cooling the laser crystal with a thermoelectric cooler and by tuning the output of the diode laser pump to an absorption peak of the absorbing ion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.