Methods for determining optical power, for power-normalizing laser measurements, and for stabilizing power of lasers via compliance voltage sensing
US9001854B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2012 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Mar 22, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/3401
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is disclosed for power normalization of spectroscopic signatures obtained from laser based chemical sensors that employs the compliance voltage across a quantum cascade laser device within an external cavity laser. The method obviates the need for a dedicated optical detector used specifically for power normalization purposes. A method is also disclosed that employs the compliance voltage developed across the laser device within an external cavity semiconductor laser to power-stabilize the laser mode of the semiconductor laser by adjusting drive current to the laser such that the output optical power from the external cavity semiconductor laser remains constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.