Web Calc Online Design

Always use the same units (inches or mm) in each calculation (unless indicated).
Enter your numbers into the light orange-colored cells. To recalculate, press the TAB
key, or click in another blue box, or click the Update button. Other formulas you’d
like to see? Engineering@fiberopticsystems.com

Note: Turn phone horizontal for best results.

Fiber Bundle -Online Design

This page allows the user to vary the fiber type and length, bundle diameter, endtips, wavelength, and the number of legs, and observe how they affect the number of fibers, transmission, and relative cost.

Fiberoptic Systems, Inc.

60 Moreland Rd Unit A, Simi Valley, CA 93065
805-583-2088 Fax805-583-4018 Engineering@fiberopticsystems.com


After changing any yellow cell, click anywhere to recalculate. Bundles 2 and 3 are relative to Bundle 1.
Choose the type of fiber:
Enter the overall length (meters):
Common Bundle Dianeter (mm):
Enter the Number of Legs:
Enter the Center Wavelength (nm):
Common End Connector:
Other End Connector(s):
Are the common end fibers stripped?
Enter the number of assemblies:
Actual bundle diameter (mm):
Internal Transmission:
Reflection Loss/surface (in air):
Core/Clad area ratio:
Core/Buffer area ratio:
The External Transmission is:
The Number of Fibers is:
The Amount of Fiber is (meters):
The Short Term Bend Radius is (mm):
The Long Term Bend Radius is (mm):
Number of Broken Fibers Allowed:
Relative Price per Unit: 1.00
Convert from inches to metric: Inches mm meters
Convert from metric to inches: mm Inches feet
Calculate the leg diameters of a common bundle (split evenly) : Common Dia. # Legs Leg Dia.
Convert Rectangle to Diameter: Width Height Diameter
Number of Fibers for Best Packing (7,19, 37, 61, 91, 127…):
Bundle Dia. Fiber Dia. # Fibers Actual Dia.
Calculate the common diameter of 2 or more legs:
#1 Dia #2 Dia #3 Dia Common
Convert NA to Angle/F#:
NA Angle/2 Angle F#
# of Fibers in a Single Row Around a Ring:
Fiber OD Inner Dia # Fibers Outer Dia

Type of Fiber: * are most popular/recommended.

Useful Wavelength Ranges: Borosilicate – 400-1600nm, Fluoride – 450-5000nm, Plastic – 400-1100nm, Singlemode – Specified in description, UV Fused Silica – 190-1400nm, WF Fused Silica – 500-2200nm.

Numbers with backslashes indicate the core/clad/buffer diameters (um).  Abbreviations are:A = Acrylate Buffer 85C,   HUV&HWF = Hard Clad,   NA= Numerical Aperture,   P = Polyimide Buffer 400C,   P22 = Polyimide Buffer .22NA,   T = Tefzel Buffer 150C,   UVNS = Non Solarizing,   WF = Water Free = IR.

Overall Length: Standard borosilicate is 6 meters long, special order 12 meters long.

Number of Legs: enter 1 for a single bundle, 2 for bifurcated (2 legs), etc.

Common Bundle Diameter: alter this cell if you want to control the number of fibers.

Center Wavelength: in nm, or enter ‘VIS’ for average 400-700nm, ‘NIR’ for 700-1600nm, or ‘UV’ for average 200-400nm.

Connectors: SMA is most popular, positive lock, 2.5mm max bundle. CPC is circular plastic connector, good for multiple bundles. Line, rectangle, hex, ring, and mask are custom housings.

Stripping: Removing the fused silica buffer allows the fibers to be more tightly packed, but makes the fibers more fragile. Borosilicate and plastic have no buffer.

External Transmission: accounts for all of the losses (internal, reflection, packing (85%), and core/buffer area ratio).

Internal Transmission: considers only the loss inside the fiber.

Broken Fiber Allowed: shown is 5% for borosilicate, 2% all others.