Mode Field Diameter calculator
Marcuse approximation of MFD for a step-index single-mode fiber.
Category: Fiber Optics
Formula: MFD/2a ≈ 0.65 + 1.619·V⁻³ᐟ² + 2.879·V⁻⁶
Inputs
| Input | Parameter | Unit | Default |
|---|---|---|---|
| Core radius a | a | µm | 4.1 |
| λ | lam | nm | 1550 |
| NA | NA | 0.14 |
Result with the default inputs
- V: 2.3268
- MFD: 9.2192 µm
Open it with your own values: put each input in the address as a parameter, for example /calculators/mode-field-diameter?a=4.1. A unit other than the listed one goes in <parameter>_unit.
Read more: Wikipedia: Mode field diameter