What is the Difference Between Fiber Laser Marking and UV Laser Marking Machine

Fiber laser marking and UV laser marking machines are both used for precision marking, but they differ significantly in terms of wavelength, material compatibility, marking mechanism, and applications. Here’s a detailed comparison:

1. Laser Wavelength & Source

• Fiber Laser Marking:

• Wavelength: 1064 nm (infrared, near-IR range)

• Laser Source: Fiber-optic laser (rare-earth-doped optical fiber)

• Pulse Duration: Nanosecond (ns) or picosecond (ps) for high-speed marking

• UV Laser Marking:

• Wavelength: 355 nm (ultraviolet range)

• Laser Source: Third-harmonic generation (from an Nd:YAG or Nd:YVO₄ laser)

• Pulse Duration: Nanosecond (ns) or femtosecond (fs) for cold marking

2. Material Compatibility

• Fiber Laser Marking:

• Best for metals (steel, aluminum, titanium, copper) and some hard plastics.

• Works well with anodized aluminum, coated metals, and some ceramics.

• Less effective on transparent/reflective materials.

• UV Laser Marking:

• Ideal for plastics, glass, silicone, PCB, and sensitive materials.

• Excellent for high-precision marking on heat-sensitive materials (e.g., medical devices, electronics).

• Can mark transparent/reflective materials (e.g., PET, polycarbonate) without thermal damage.

3. Marking Mechanism

• Fiber Laser:

• Thermal process – Uses heat to engrave or change surface properties (e.g., annealing, deep engraving).

• Can produce dark/black marks on metals via oxidation.

• UV Laser:

• Cold marking – Uses photochemical ablation (breaks molecular bonds without heat).

• Produces high-contrast, clean marks without burning or melting.

4. Applications

5. Advantages & Limitations

Conclusion: Which One to Choose?

• Choose Fiber Laser if you need high-speed, durable marking on metals.

• Choose UV Laser if you work with plastics, glass, or sensitive materials requiring no thermal damage.