MOPA stands for Master Oscillator Power Amplifier.
A MOPA laser is a sophisticated type of fiber laser that gives you much greater control over how the laser interacts with a material — especially metals.
Unlike standard fiber lasers (which have mostly fixed pulse characteristics), a MOPA laser allows you to independently adjust:
- Pulse width (how long each laser pulse lasts)
- Pulse frequency (how often pulses fire)
This control lets you fine-tune how heat is delivered to the surface.
The significant advantage of MOPA for jewelry engraving is that it can produce cleaner edges, better contrast, and more artistic effects compared to non-MOPA fiber lasers because of the fine-tuned control. Non-MOPA fiber lasers are great if you’re looking for deep engraving.
If you’re working with stainless steel, MOPA lasers offer a much bigger advantage because you can manage heat better. Stainless steel reacts to heat in interesting ways that can give you funky results.
MOPA lasers can:
- Create high-contrast black markings on stainless steel
- Produce color marking on stainless steel and titanium
- Reduce burn marks and heat damage on delicate pieces
- Achieve finer detail on small or thin jewelry items
- Produce less melting and charring in some plastics
The xTool F2 Ultra is a MOPA fiber laser while the F1 Ultra is a standard fiber laser.
- XTool Laser Engraver and More
Shop XTool Engravers
✨ At Stones and Findings, we provide everything from high-quality blanks to professional training, so you can confidently expand your skills and offer meaningful, personalized pieces to your clients.
Watch the Full Engraving Demo
Want to see the process in action? 🎥
We filmed the entire engraving demo with Alex Warner live at PJX.