D37 ET7 Protective Window 1090nm 40 kW for Fiber Laser Cutting Heads (10 pcs)

replacement protective window in d37 / et7 rated up to 40 kw, made for fiber laser cutting heads. the 1090 nm ar coating keeps transmission high while the window absorbs contamination instead of the focus lens.

size:

• diameter (d): 37 mm
• thickness (et): 7 mm
• pack: 10 × protective window

spec:

• ar coating optimised for 1090 nm fiber laser systems
• suitable for 40 kw cutting systems
• thick 7 mm window for high-power heads and higher gas pressure
• plane-parallel faces help keep focus and gas flow consistent

material:

• quartz fused silica window
• stable under rapid local heating from spatter hits
• ar coating applied to both surfaces for high transmission

use:

• protective window in fiber laser cutting heads
• shields the focus lens from dust, fumes and metal spatter
• lets you swap a cheap window instead of cleaning or replacing the lens
• high-power cutting of thick plate on 30 kw+ sources

compatibility:

• for fiber laser cutting heads that use round d37 mm × et7 mm protective windows
• also available in a 60 kw and 20 kw version in the same size; choose the class that matches your laser source
• match diameter, thickness and power class with the window you are replacing

quality:

• each window visually inspected for coating defects and scratches
• clean, chip-free edges
• packed individually to keep the optical faces clean