The Fiber Laser Source of Laser Machine Using

The fiber laser source is a critical component in laser machines, providing the high-intensity laser beam used for cutting, welding, engraving, and marking various materials. Here is an overview of how it works and its applications:

1. What is a Fiber Laser Source?

• A fiber laser generates laser light using an optical fiber doped with rare-earth elements (like Ytterbium, Erbium, or Thulium).

• The laser beam is amplified within the fiber optic cable, resulting in high power efficiency and beam quality.

2. Key Components of a Fiber Laser Source

• Laser Diode Pump: Provides the initial light energy to excite the doped fiber.

• Active Fiber (Doped Fiber): Where light amplification occurs.

• Fiber Bragg Gratings (FBG): Act as mirrors to reflect and amplify the laser light.

• Delivery Fiber: Transmits the laser beam to the processing head.

3. Advantages of Fiber Laser Sources

✔ High Efficiency (up to 30-50% electrical-to-optical conversion)
✔ Superior Beam Quality (ideal for precision cutting & engraving)
✔ Low Maintenance (no mirrors or gases required, unlike CO₂ lasers)
✔ Long Lifespan (100,000+ hours for diodes)
✔ Compact & Robust (fiber-based design resists misalignment)

4. Applications in Laser Machines

• Metal Cutting (steel, aluminum, copper)

• Laser Welding (automotive, aerospace)

• Laser Marking & Engraving (barcodes, serial numbers)

• Microprocessing (electronics, medical devices)

5. Common Fiber Laser Wavelengths

• 1064 nm (Ytterbium-doped) – Most common for metal processing.

• 1550 nm (Erbium-doped) – Used for plastics and some medical applications.

• 1940 nm (Thulium-doped) – Suitable for medical and specialty materials.

6. Fiber Laser vs. CO₂ Laser

7. Leading Fiber Laser Manufacturers

• IPG Photonics (Industry leader)

• nLIGHT

• Coherent (formerly Rofin)

• Raycus (Chinese brand, cost-effective)

• Max Photonics