Square Core Fiber
Everfoton's Square Core Fiber with special optical spot shaping requirements is developed using the independent patented manufacturing platform.Compared with circular core fibers,the square-core fiber produces output beams that are close to square-shaped. This shape allows for a more uniform treat-ment of output spot energy, making it particularly suitable for high-efficiency welding and heat treatment.
  • Perfect fiber geometries and low transmission loss

  • Standard symmetrical square shape with adjustable square core corner radius

  • Homogeneous beam output of the square core

  • Customized shape and size requirements

Specifications
Fiber Type SI 50*50/250-12/400(DC) SI 100*100/400-12/540(DC)  SI 200*200/400-22/540(DC)

SI 200*200/400 -22/540(DC)

SI 300*300/500-22/620(DC)

SI 400*400/660-22/840(DC)
Part No. SI2118-F SI2118-D SI2118-A

SI2118-A

SI2118-H

SI2118-E
Optical Properties
Operating Wavelength (nm)

900~1100

Core NA 0.12 ± 0.02 0.12 ± 0.02 0.22 ± 0.02 0.22 ± 0.02 0.22 ± 0.02 0.22 ± 0.02
Cladding NA ≥ 0.46 ≥ 0.46 ≥ 0.46 ≥ 0.46 ≥ 0.46 ≥ 0.46
Cladding Attenuation@1095nm (dB/km) ≤ 15 ≤ 15 ≤ 15 ≤ 15 ≤ 15 ≤ 15
Geometrical Properties
Side Length of Core (μm) 50.0 ± 3.0 100.0 ± 5.0 200.0 ± 5.0

200.0±6.0

305.0 ± 6.0

400.0 ± 8.0
Cladding Diameter (µm) 250.0 ± 5.0 400.0 ± 10.0 400.0 ± 10.0

400.0±10.0

500.0 ± 10.0

660.0 ± 10.0
Coating Diameter (µm) 400.0 ± 15.0 540.0 ± 20.0 540.0 ± 20.0

540.0±20.0

620.0±10.0

840.0 ± 20.0
Material Properties
Proof Test (kpsi) ≥ 100
inner Coating Material Low Refractive Index Coating
Outer Coating Material Acrylic Resin
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