A fibre laser's gain medium is an optical fibre enhanced with rare-earth element traces. One or more low-energy diodes (also known as seed lasers) emit light beams, which are amplified and channeled by the optical fibre to generate a laser beam.
With a wavelength of 1.064 micrometres, fibre lasers beams are in the near-infrared range on the electromagnetic spectrum. This wavelength is relatively long, which enables fibre lasers to vaporize metal. In other words, metal and coated metal surfaces can be engraved using a fibre laser.
MOPA (master oscillator power amplifier) laser is a distinct type of fibre laser, which has predetermined adjustable pulse durations (between 4 and 200 ns). This unique characteristic offers the user a high degree of flexibility when processing metal workpieces. For example, anodised aluminum can be marked in different shades of black and uncoated steel can be annealed in different colours. In addition, MOPA lasers are capable of creating high-contrast markings on some plastics.
Models in Trotec's Speedy, SpeedMarker, and ProMarker series are available in fibre and MOPA configurations.
Explore Trotec's Fibre and MOPA Laser Systems