Which lasers require air cooling and water cooling?

The cooling method of a laser usually depends on its power, application requirements, and working environment. The following are some common types of lasers and their common cooling methods:

Gas laser:
Air or water cooling. High power gas lasers typically require a water-cooling system to effectively cool the laser medium and maintain equipment stability. Gas lasers with lower power may use air-cooled systems.

Solid state laser:
Water cooling. Most solid-state lasers require a water cooling system, especially during high-power operation. This helps to maintain a stable temperature for laser crystals or other solid materials.

Semiconductor laser:
Air cooling or heat sink cooling. Smaller power semiconductor lasers can typically use air-cooled systems. Higher power lasers may require more powerful cooling systems, including heat sink cooling.

Fiber laser:
Air or water cooling. Fiber lasers typically have relatively high efficiency, while high-power fiber lasers may require a water cooling system.

Free electron laser:
Water cooling. Due to the fact that free electron lasers typically operate at high power and frequency, they typically require a powerful water cooling system to prevent equipment overheating. When choosing a laser cooling method, it is necessary to consider the power, operating time, ambient temperature, and application requirements of the laser. Some high-power or long-term operating lasers typically require a more powerful cooling system to ensure the stability and lifespan of the equipment.