Lasers that operate independently of temperature
US7450626B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 19, 2007 |
| Grant date | Nov 11, 2008 |
| Priority date | — |
| Expiry date | Jan 19, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/17
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Apparatus, methods, systems and devices for providing a temperature independent laser by determining a temperature dependence of a lasing wavelength, selecting the lasing wavelength having minimal temperature dependence and constraining the lasing wavelength of the laser device to the selected lasing wavelength. In an embodiment, a volumetric Bragg grating in photo-thermal refractive glass is used as a laser cavity mirror for constraining the laser emission at the selected wavelength. The laser device may be a broad spectrum laser such as an Er3+ doped glass broad spectrum laser. In an embodiment, the lasers are operated where the temperature dependence of the stimulated emission cross section is used to compensate for temperature dependent changes of other laser components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.