Apparatus, method, and computer program product for controlling laser wavelength stability
US8879591B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2005 |
| Grant date | Nov 4, 2014 |
| Priority date | — |
| Expiry date | Mar 17, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/06758
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus includes a laser that generates a predetermined wavelength when the laser operates at room temperature, the predetermined wavelength being offset from a specific wavelength. The laser has a controlled wavelength range due to a wavelength drift, the wavelength range having a first wavelength as the upper boundary and a second wavelength as the lower boundary, the first wavelength is generated when the laser operates at a first temperature of an ambient and the second wavelength is generated when the laser operates at a predetermined temperature higher than a second temperature of the ambient. The apparatus includes a heater that heats the laser such that a wavelength in the controlled wavelength range that is generated by the laser when heated by the heater from the second temperature is longer than a short wavelength that is generated by the laser centered on the specific wavelength that operates at the second temperature; and a control circuit configured to turn on the heater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.