Fluorine Doped Step Index Preform – FSI
Designed for high power laser transmission in a wide spectral range from 200nm to 2000nmAvailable for transmission applications in the UV and IR region Customized preforms: modular step profiles
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| Numerical aperture: | high / low NA: 0 – 0.25, Standard NA = 0.22 +/-0.02
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| Core to cladding diameter ratio (CCDR): | 1.01 up 2.0 (standard NA) and 4.0 (lower dopant concentration)
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| Outside Diameter: | 18 – 70mm
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| Core material: | Low OH (<0,7ppm and 5-20ppm), High OH (1200ppm)
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Typical attenuation of FSI-UV and FSI-IR type preforms
Benefits of j-plasma's FSI-type preforms
Due to our special design FSI preforms show a superior performance during draw, and allow for excellent diameter controlFiber drawn from FSI type preforms can easily be spliced and making it the material of choice in high power laser applicationsDue to our distinct process the preforms are showing very consistent geometries; the fibers are characterized by exceptional strengthFSI-IR type material is available in a wide range on OH-levels, selection can be done depending on the customer specific applicationAll FSI type preforms are available in customized geometries such as diameter,length, CCDR and NA level
Contact us for your individual quote! 
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FSI preforms (pdf)
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