Argon gas lasers have proven themselves for different applications. Their emission in the visible, typically at wavelengths of 488 and 515 nm permits to do flow cytometry, laser doppler velocimetry etc. Nevertheless, these outworn systems have low optical-electrical efficiency (< 0.1 %). The system consists of an Argon tube that need to be replace when the lifetime of Argon ions is reached. They need a cooling system by water because almost all the energy brought by the pump is transformed into thermal energy that must be dissipated.

Moreover, it is a complex technology that is likely to misalign and therefore requires regular verification and some time spent to make a rigorous alignment. Finally, in terms of ergonomics, these lasers are bulky (weight and size) and in terms of reliability and lifetime, their competitors are much better. However, they can be replaced by better technology : fiber laser.