Enter the optical power that propagates away from grating and the optical power incident on the grating into the calculator to determine the Diffraction Efficiency.
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Diffraction Efficiency Formula
The following formula is used to calculate the Diffraction Efficiency.
Ediff = Pm / Pinc *100
- Where Ediff is the Diffraction Efficiency (%)
- Pm is the optical power that propagates away from grating
- Pinc is the optical power incident on the grating
How to Calculate Diffraction Efficiency?
The following two example problems outline how to calculate the Diffraction Efficiency.
Example Problem #1:
- First, determine the optical power that propagates away from grating. In this example, the optical power that propagates away from grating is given as 50.
- Next, determine the optical power incident on the grating. For this problem, the optical power incident on the grating is given as 70.
- Finally, calculate the Diffraction Efficiency using the equation above:
Ediff = Pm / Pinc *100
Inserting the values from above and solving the equation:
Ediff =50 / 70 *100 = 71.14 (%)
Example Problem #2:
Using the same process as above, first define the variables required by the formula. In this case, these values are:
optical power that propagates away from grating = 30
optical power incident on the grating = 80
Entering these values yields:
Ediff = 30/ 80 *100 = 37.5 (%)
