Enter the power coupled into the fiber and the power emitted from the source into the Fiber Coupling Efficiency Calculator. The calculator will evaluate the Fiber Coupling Efficiency. 

Fiber Coupling Efficiency Formula

The following two example problems outline the steps and information needed to calculate the Fiber Coupling Efficiency.

nfc = Pf / Ps * 100

Variables:

  • nfc is the Fiber Coupling Efficiency (%)
  • Pf is the power coupled into the fiber 
  • Ps is the power emitted from the source 

How to Calculate Fiber Coupling Efficiency?

The following steps outline how to calculate the Fiber Coupling Efficiency.


  1. First, determine the power coupled into the fiber. 
  2. Next, determine the power emitted from the source. 
  3. Next, gather the formula from above = nfc = Pf / Ps * 100.
  4. Finally, calculate the Fiber Coupling Efficiency.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

power coupled into the fiber = 50

power emitted from the source = 75

nfc = Pf / Ps * 100 = ?