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Q Switched V.S Mopa
Jul 30, 2018

Advantages of MOPA laser marking

Selectable pulse durations not only improve laser marking results on certain metals and plastics, but also provide more marking capabilities. With the MOPA laser, the pulse durations can be set to predefined values between 4 and 200 ns. Because it offers such a wide range of pulse durations, the MOPA is one of the most flexible lasers on the market. It can simulate the properties of conventional fiber laser markers (relatively long pulses) and those of classical solid state lasers (relatively short pulses) such as Nd:YAG or Nd:YVO4 (vanadate). You can also produce qualitatively equivalent markings with the MOPA laser partially faster than with the conventional fiber laser marker.

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Using short pulses and lower pulse energy heat the material less, and the area of the heat affected zone is reduced. This results in more advantages and possibilities for laser marking metals and plastics:

Less burning/melting in the edge area of metal engravings

Less heat development during annealing markings on metal, which leads to a better corrosion behavior

Creation of reproducible annealing colors on stainless steel

Black marking of anodized aluminum Controlled melting of plastics

Less foaming with plastics

More homogeneous and sometimes higher-contrast markings on some plastics

The advantages of the conventional fiber laser sources remain unchanged:

maintenance-free

long service life

air-cooled

cost-effective