Laser welding commonly utilizes several types of lasers, each suited for different materials and applications. The most common types include:

1. CO2 Lasers :
- Wavelength: 10.6 micrometers
- Suitable for: Non-metal materials (plastics, wood, etc.) and some metals.
- Advantages: High power and efficiency, good for thick materials.

2. YAG (Yttrium Aluminum Garnet) Lasers :
- Wavelength: 1.064 micrometers
- Suitable for: Metals and some ceramics.
- Advantages: High peak power, good beam quality, and can be used in pulsed or continuous wave modes.

3. Fiber Lasers :
- Wavelength: 1.064 micrometers (similar to YAG)
- Suitable for: Metals, especially reflective ones like aluminum and copper.
- Advantages: High efficiency, compact size, and excellent beam quality.

4. Diode Lasers :
- Wavelength: Varies (typically around 800-980 nanometers)
- Suitable for: Thin materials and specific applications like spot welding.
- Advantages: High efficiency, low cost, and suitable for integration into systems.

5. Disk Lasers :
- Wavelength: 1.03 micrometers (similar to YAG)
- Suitable for: Thick materials and high-speed applications.
- Advantages: High power output and excellent beam quality.

Each type has its unique advantages, making them suitable for different welding tasks, materials, and production requirements.

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