What is tunable diode laser spectroscopy?

With regards to TDLAS (tunable diode laser spectroscopy), it is a way through which scientists can easily determine the different concentrations trace gases have, by having their narrow band absorption structure in the visible and ultraviolet spectral region analyzed. This technology consists of a an optical setup which is instrumental to sending and receiving light through the atmosphere, an Xe arc lamp and of course, a continuous light source.

However, if there are no artificial light sources available, individuals may also use the sunlight (direct or scattered) as a source. With regards to the basic length of the light path in the atmosphere, it varies between a few hundred meters and up to plenty of km.

When it comes to the way the tunable diode laser spectroscopy analyzer is constructed, people should know that it's built from a state of the art spectrometer, computer circuits and, of course, associated control circuits. The spectrometer will basically make use of an optical grating so that the light can eventually be split into narrow wavelength bands. No one should worry in this regard, because if needed, it can easily be set so that the right range of wavelengths to be detected. In this regard, TDLAS is a definite breakthrough in modern technology.

Last but not least, the light will be turned into electrical signals. This is a process that happens a few hundred times over a second and before it is evaluated by the specialists, the registered spectra will basically be stored on the free hard drive space of a regular computer. As people can see, tunable diode laser spectroscopy is needed not only for industrial use, but for further scientific experiments.

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