Multi-pass laser amplifier with staged gain mediums of varied absorption length
US7720126B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 2008 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Jan 24, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1685
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser amplification system is disclosed that enables reliable operation over large ambient temperature operating window, as well as a significant reduction of laser temperature sensitivity typically associated with diode pumped lasers. The techniques employed by the system effectively eliminate damaging gain hot spots and lower ASE and ESA thresholds, thereby increasing laser peak and average power levels. Additionally, the techniques allow for thermal programming of active gain medium material to minimize thermally induced aberrations. In one particular example embodiment, a variable dopant concentration multi-pass laser amplifier is provided having a customized active ion concentration profile, tailoring the combination of laser absorption and gain distribution using a ceramic YAG host.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.