Product code - Customized Solutions
The properties of our Fluosil® preforms are characterized by their product codes. The nomenclature is explained in the following sections:
a) Fiber type
”S” is universally used to indicate step index optical profiles.
b) Cor material - Your Choice
Second portion of the product code signifies the type of core material used. “S”, “B”, or “X” identifies high OH materials mainly for UV applications, while “W” or “T” correspond to low OH materials for broad wavelength applications. Germanium doped core materials for applications where a numerical aperure >0.28 is required are identified by “L” for low, “H” for high, or “G” for graded index profile.
c) Flexible fiber design
Due to our broad range of production capabilities we are able to realize complex customized fiber designs with multiple layer structures or special shapes. These different structrures can be achieved by POD or utilizing jacket tubes for thicker layer. Single step cladding structures are indicated by the letter “U”. Double or multiple cladding structures are indicated by an “S”.
d) Cladding to core diameter ratio (CCDR)
The relative thickness of the different layers is described by the CCDR, the cladding to core diameter ratio. As a rule of thumb, for low attenuation fibers, the cladding thicknes should be ten times of the operational wavelength.
e) Numerical aperture (NA)
The nomenclature in the product code for NA is blank for standard NA (0.22 ± 0.02); “L” for low NA (<0.2); “H” for high NA (0.26 ± 0.02); “SH” for super high NA (>0.26). With respect to F300 the highest achievable NA's are 0.28.
