General

Fiber vs. MOPA

Explains the key differences between Q-switched fiber and MOPA laser sources, including why MOPA offers wider frequency range and color/contrast capabilities.

1 min readWatch the videoUpdated Jul 2026
Applies toAll machinesTopicGeneral

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.

TL;DR:

MOPA can do this (fiber can't):

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