There are a wide variety of applications for specialty fibers. For each of these applications a tailored fiber design is required for geometry, refractive index steps and transmission window. With our Fluosil® preforms, Heraeus Covantics is able to offer different solutions depending on your requirements.
We can offer different core materials depending on the wavelength you want to use and can apply from single to multiple layers with different refractive index steps. Finally, we can adjust the shape of core and cladding to your requirements.
In addition, we offer our Plasma Outside Deposition (POD) process as service to coat your own core rod with a highly fluorine doped layer.
If you need assistance or guidance, please give us a call.

Product Benefits
- High purity fused silica has a broad spectral transmission window, which makes it the material of choice for applications from the deep UV up to the infrared.
- Due to its high purity Fluosil® synthetic fused silica preforms have a superior laser damage threshold for material processing with high power lasers.
- Synthetic fused silica with highest purity is biocompatible and well suited for medical laser and minimal invasive surgeries.
Fields of Application
Minimally Invasive Surgeries
For medical treatments the most common wavelengths are given below with suitable preform types. For tight bend radii also high NA versions are available.
Preform Types
Therapy
Laser
Laser Color
Wavelength
Preform Type
Laser Coagulation
KrF
Dark Purple Laser
248 nm
SSU/SBU
Treatment of UV light sensitive skin diseases
XeCl
Purple Laser
308 nm
SXU
Dentistry
Ar+
Turquoise Laser
488 nm
SSU
Benigne Prostata Hyperplasie
NdYAG2F
Green Laser
532 nm
SSU
Photo Dynamic Therapy
HeNe
Red Laser
633 nm
SSU
Ophthalmology
NdYAG
IR Laser
1064 nm
SWU
Lithotripsy
HoYAG
IR Laser
2100 nm
SWU
Material Processing
Laser systems are used more and more commonly for material processing. Independent from the laser source in most cases an optical fiber is used to transmit the laser light from the system to the point of use. Depending on beam quality, spot size and additional required features of the final fiber we can realize your design. Even custom tailored in small quantities.
Wavelength Range
Preform Type*
UV (185-580 nm)
SSU/SSS
IR (700-2200 nm)
SWU/SWS
*SSU/SWU = single layer preform type / SSS/SWS = multi-layer preform type
Spectroscopic Applications
Optical fibers for spectroscopic applications need to transmit the light from the source and signals back without introducing additional absorption lines.
Preform Types
Transmission Range
Wavelength Associated
Preform Type
Broad spectral range
350 - 2200 nm
STU-D
Deep UV / UV-Radiation hard
185 - 580 nm
SBU
Infrared range
700 - 2200 nm
SWU
Resistance against y-radiation
185 - 580 nm
STU-D / SSU
UV Bundle Applications
For transmitting light in the deep UV range fused silica is the material of choice as it has a high resistance to UV radiation. It can be used for UV curing of adhesives or bundles for large homogenous spot sizes.
Webinar
Topic: Optical Fused Silica Large-Core Fibers - Influence of Design and Material on Fiber Performance

Downloads
Data Sheet: Specialty Fiber Preforms
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