Method for operating an optical measuring system for measuring the concentration of a gas component in a measured gas
US10175166B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2018 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | Mar 22, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/06113
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for operating an optical measuring system for measuring the concentration of a gas component in a measured gas, based on wavelength modulation spectroscopy, wherein a laser light source is operated in a current-modulated manner with a base current IDC and a modulation current IAC and a laser beam of the wavelength λ0 having a wavelength modulation amplitude ΔλAC is emitted, and the wavelength modulation amplitude ΔλAC of the laser light is kept constant by way of variable setting of the current modulation amplitude ΔIAC. The method provides for keeping a modulated power ΔPAC at an internal resistor RI of the laser light source constant at the operating point so as to stabilize the wavelength modulation amplitude ΔλAC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.