A gas detection laser is an instrument that uses laser technology to measure gas concentration. It emits a laser beam into the gas and then analyzes the absorption or scattering of the laser beam to infer the gas concentration. This method has high sensitivity and accuracy, and can achieve rapid, online monitoring of specific gases.
Specifically, gas detection lasers have the following working principles and applications:
1. Laser absorption spectroscopy technology (such as TDLAS):
Principle:
Gas molecules have a specific absorption spectrum, which means that they can only absorb laser beams of a specific wavelength. When a laser beam of a specific wavelength passes through the gas being measured, if the gas molecules match the laser wavelength, absorption occurs, causing the laser intensity to attenuate. By measuring the attenuation of the laser intensity, the gas concentration can be inferred.
Application:
Tunable semiconductor laser absorption spectroscopy (TDLAS) is a commonly used gas detection method that uses wavelength modulation of tunable semiconductor lasers to achieve accurate measurement of specific gases. This technology is often used in industrial process monitoring, environmental monitoring, safety protection and other fields.
Laser type:
The commonly used lasers in TDLAS include DFB (distributed feedback) lasers, DBR (distributed Bragg reflector) lasers, external cavity tuned semiconductor lasers, etc.
Boxoptroincs can provide DFB gas lasers: 760nm (O2) 1392nm (H2O) 1512nm, 1531nm (NH3) 1532.68nm (C2H2) 1576nm (CO) 1580 (CO2) 1650.9nm, 1653.7nm (CH4) 1683nm (CH3)