Tunable Diode Laser Absorption Spectroscopy

Tunable diode laser absorption spectroscopy (TDLAS) is a technique for measuring the concentration of certain gases using tunable diode lasers and laser absorption spectrometry. If a laser is tunable, its wavelength can be changed within a defined range in a controlled manner. Other important variables are tuning speed and prevention of mode hopping.

Tunable Diode Lasers (TDL) are used in open path monitoring systems, such as the Boreal Laser TDL units.

The advantage of TDLAS over other techniques for concentration measurement is its ability to achieve very low detection limits. TDLAS is by far the most common laser based absorption technique.

TAS has decades of experience fielding and maintaining over 80 TDAS units from various manufacturers.