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.

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## 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

To calculate the fiber coupling efficiency, divide the power coupled in to the fiber by the power emitted from the source.

## How to Calculate Fiber Coupling Efficiency?

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

- First, determine the power coupled into the fiber.
- Next, determine the power emitted from the source.
- Next, gather the formula from above = nfc = Pf / Ps * 100.
- Finally, calculate the Fiber Coupling Efficiency.
- 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** **= ?