How to Calculate Q Factor of Resonant Cavity - Tutorial, Formula, Example

How to Calculate Quality (Q) Factor of Resonant Cavity - Tutorial

This tutorial explains you how to calculate q factor of resonant cavity in optical systems.

Formula :

Q Factor of Resonant Cavity = 2 * Π * F o * E / P
Where,
Π=3.1415929203539825 F 0=Resonant frequency E=Stored energy P=Power dissipated

Example:

Find out the quality factor of resonant cavity, if the resonant frequency is 3, power dissipated is 5 and stored energy is 6.

Given,

Resonant frequency (F 0) = 3 Stored energy (E) = 6 Power dissipated (P)= 5

To Find,

Quality factor of resonant cavity

Solution:

Substitute the given values in the formula to find the quality factor of resonant cavity,

=2 * Π * F o * E / P = 2*22/7*6*3/5 = 36*3.14/5 = 22.6


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