d = 10 μm
λ1 = 850 nm
λ2 = 1300 nm
λ3 = 1550 nm
If given Numerical Aperture 1 %,2 %, and 3 %, Calculate the V-parameter and define the optical fiber mode!
(Note : d = diameter, λ = wavelength)
Answers :
V = k . a . NA

NA1 = 1 %

NA2 = 2 %

NA3 = 3 %

The Requirement of Multimode is : V > 2,405
So, Even Though NA 1%, 2 %, and 3 %, The Value of V are still under 2,405 so the value tha we got is Single mode Fiber Optic.