MOPA vs. Q-Switched: Why It Matters
This is where JPT pulls ahead significantly.
Q-Switched Lasers (All Three Brands)
Q-switched fiber lasers produce fixed-width pulses (typically 50–200 ns) at fixed frequencies. They’re the standard for:
- Black/gray annealing marks on stainless steel
- Surface engraving on metals
- Standard part marking and serialization
All three brands offer Q-switched options, and the performance difference between them for basic marking is modest.
MOPA Lasers (JPT Leads)
MOPA (Master Oscillator Power Amplifier) lasers allow independent control of pulse width and frequency. This unlocks capabilities that Q-switched lasers simply cannot achieve:
- Color marking on stainless steel — MOPA can produce black, white, yellow, blue, and red marks by varying pulse parameters
- Fine detail on sensitive materials — Short pulse widths (2–10 ns) minimize heat input
- Marking on plastics and polymers — Better absorption control for non-metal applications
- Anodized aluminum marking — Cleaner, higher-contrast marks without damaging the anodized layer
JPT’s M7 MOPA series is the most mature and widely available MOPA option from any Chinese manufacturer. Raycus has recently introduced MOPA models, but their pulse control range is narrower. MAX’s MOPA offerings are even more limited.
When TechMark Solutions in Munich needed to mark color codes on stainless steel surgical tools, the JPT MOPA was the only Chinese source that delivered consistent results. “We tested all three brands,” says their applications engineer, Stefan. “The Raycus Q-switched gave us black marks only. The JPT MOPA gave us the full color spectrum we needed for our medical clients.”
Need color marking capability? [Check out our JPT MOPA laser marking machines →]
