Single Mode Fiber Diameter Calculator

This page explains how to calculate the single mode fiber diameter. It provides a calculator that takes wavelength and Numerical Aperture (NA) as inputs and calculates the maximum core diameter as output. The formula used for the core diameter calculation is also explained.

Single Mode Fiber Diameter Calculator

Example Values:

• INPUTS: V-number = 2.405, λ = 1550 nm, NA = 0.12
• OUTPUTS: 9.888 µm

Single Mode Fiber Diameter Formula

The following formula is used for the single mode fiber diameter calculation:

$d = (2 \* λ \* V) / (π \* NA)$

Where:

• d = Core Diameter
• λ = Wavelength
• V = Normalized Frequency (V-number)
• NA = Numerical Aperture

Here, V is the normalized frequency or V-number.