Water-Cooled Laser Beam Dump

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This water-cooled laser beam dump is meticulously designed for lasers with wavelengths of 2.94 µm and 2.78 µm. At these specific wavelengths, water exhibits extremely short absorption lengths, causing intense heat build-up behind the calcium fluoride (CaF2) front window. This phenomenon can lead to excessive temperatures and cracking of the window.

To prevent catastrophic window damage, this innovative design incorporates a water cooling system. The cooling water flows directly against the back of the window, effectively drawing heat away from the vulnerable area. This ingenious solution mitigates the risks associated with the short absorption lengths at the specified wavelengths.

Furthermore, to prevent galvanic reactions within the water system, all wet components are constructed from either stainless steel or plastic. This meticulous design ensures that no contaminants are introduced into the cooling fluid, maintaining the system's integrity.

Specifications:

• Dimensions: 3.125" (H) x 3.125" (W) x 2.000" (D) 
• Window: Uncoated Calcium Floride, 2.000" (Dia) x 0.250" (T)  
• Clear Aperture Diameter: 1.500"   
• Maximum Beam Diameter: 1.000"    
• Maximum Average Power Dissipation: 1 kW
• Flow Rate: 5 to 15 lpm   
• Maximum Water Temperature: 30 °C
• Minimum Water Temperature: 15 °C  
• Maximum Dew Point: 12 °C   
• Water Ports: 1/2" Polypropylene or Acetal Push Fitting