MOPA Laser vs. Fiber Laser:
what are the benefits?

When we talk about LASERS, we must keep in mind three macroscopic measurement parameters:
  • Frequency (or rather the number of pulses in relation to a length of time) -> kHz
  • Power -> W
  • Speed -> mm/s (or px/s)
  • Laser pulses are usually fixed: with standard fiber lasers, a pulse has a duration of about 120 ns, while the pulse frequency varies from 20 to 100 kHz.

    Instead, with MOPA lasers, pulse duration varies and can be set in a range from 4 to 200 ns, with a frequency ranging from 20 kHz to 1 MHz. The short pulse is especially useful for marking on plastics, as it prevents burning the material by avoiding direct contact.

    Powermark-Immagine MOPA Laser vs. Fiber Laser: what are the benefits?

    What are the benefits of a variable pulse?

    The MOPA laser maintains the benefits of traditional Fiber (no maintenance, long life and air cooling) but can boast a number of added values for marking both plastics and metals.

    METALS PLASTICS
    Colored markings on steel
    High contrast
    Black marking on anodized aluminum
    Greater uniformity
    Less corrosion due to limited heat input during annealing of the markings
    No burning
    Fewer burns on the edges of the engraving
    Reduced foam
    Marcatura-Colorata-03 MOPA Laser vs. Fiber Laser: what are the benefits?
    Colored markings on steel
    campione-mopa-04 MOPA Laser vs. Fiber Laser: what are the benefits?
    Black marking on anodized aluminum
    campione-mopa-01 MOPA Laser vs. Fiber Laser: what are the benefits?
    Black marking on anodized aluminum

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    CampioneMopa-01 MOPA Laser vs. Fiber Laser: what are the benefits?

    The initial drawback of this technology could be its price, but the difference with a traditional fiber is so minimal that it is largely compensated by its application flexibility.

    However, it is worth specifying that, if we have to mark natural aluminum or die-cast products, a traditional fiber laser may be sufficient to achieve high quality results.

    In conclusion, when is it worth using?

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