Optical Fiber V Parameter and Cutoff Calculator

Optical Fiber V Parameter and Cutoff Calculator calculator can be used to calculate the V parameter and cutoff wavelength of an optical fiber based on its core diameter, numerical aperture, and wavelength of light.

Input Parameters

Calculation Results

Calculation Formula

V = (2π * a / λ) * NA

Where:
V = V parameter
a = Core radius (µm)
λ = Wavelength (µm)
NA = Numerical Aperture

Cutoff Wavelength (λc): λc = (2π * a) / (Vc)

Where:
λc = Cutoff Wavelength (µm)
a = Core radius (µm)
Vc = Cutoff V parameter (Vc = 2.405 for step-index fiber)

Optical Fiber V Parameter and Cutoff Calculator Calculator Usage Guide

Learn how to use the Optical Fiber V Parameter and Cutoff Calculator calculator and its working principles

How to Use the Calculator

  1. Enter the core diameter of the optical fiber in micrometers (µm).
  2. Enter the numerical aperture (NA) of the optical fiber.
  3. Enter the wavelength of the light in micrometers (µm).
  4. Click the "Calculate" button to compute the V parameter and cutoff wavelength.
  5. The results will be displayed in the respective fields.

Understanding the V Parameter and Cutoff Wavelength

The V parameter is a dimensionless number that characterizes the optical waveguide. It is defined as:

V = (2π * a / λ) * NA

Where:

  • V = V parameter
  • a = Core radius (µm)
  • λ = Wavelength (µm)
  • NA = Numerical Aperture

The cutoff wavelength is the minimum wavelength at which light can propagate through the fiber. It is given by:

λc = (2π * a) / (Vc)

Where Vc is the cutoff V parameter, which is approximately 2.405 for step-index fibers.

Applications

This calculator is useful for designing and analyzing optical fibers for various applications, such as telecommunications, sensors, and imaging systems. By knowing the V parameter and cutoff wavelength, engineers can ensure that the fiber will support the desired mode of light propagation.