Fiber vs. MOPA

Fiber machines are q-switched and mopa uses a master oscillator power amplifier. so basically it’s just different technology in the source. The mopa can pulse with more amplitude so you can actually dial in the frequency and other settings to create different colors and contrasts, whereas a standard fiber source has narrower frequency range.

You can see the color marking effects that MOPA can achieve in the video:

Apart from the most significant difference, here are more detailed distinctions between fiber and MOPA:

Pulse Duration Control

MOPA: Offers adjustable pulse durations, which provides greater flexibility in marking various materials including non-metallic.

Fiber: Typically has fixed pulse durations, which can limit its versatility.

Marking Quality on Various Materials

MOPA: Excels at marking plastics and metals with a variety of colors and high contrast, especially effective on anodized aluminum and black marking on metals.

Fiber: Suitable for high-quality marking on metals but less effective on plastics and materials requiring color marking.

Heat Management

MOPA: Generates less heat, reducing the risk of material damage or deformation, making it suitable for sensitive materials.

Fiber: Generates more heat, which can lead to material warping or damage in some applications.

Cost and Efficiency

MOPA: Generally more expensive due to its advanced capabilities and flexibility.

Fiber: More cost-effective for straightforward metal marking tasks, often with lower maintenance costs.


In conclusion, if your applications require flexibility, high contrast, and the ability to mark a wide range of materials with precision, a MOPA laser is the better choice. For straightforward metal marking with high efficiency and lower costs, a fiber laser is ideal.