Given,
Core index =1.68
Radius =35μm=35\mu m=35μm
Index difference =3.75%=3.75\%=3.75%
wavelength (λ)=1150nm=1150×10−9m(\lambda) =1150nm = 1150\times 10^{-9}m(λ)=1150nm=1150×10−9m
0.0375=1.68×I10.0375=1.68 \times I_10.0375=1.68×I1
I1=0.03751.68=0.02232I_1=\frac{0.0375}{1.68}= 0.02232I1=1.680.0375=0.02232
Index =Io−I1=I_o-I_1=Io−I1
=1.68−0.02232=1.68-0.02232=1.68−0.02232
=1.65=1.65=1.65
P=12Io(πW2)P=\frac{1}{2} I_o(\pi W^2)P=21Io(πW2)
P=12×1.65×3.14×0.1150P=\frac{1}{2} \times 1.65 \times 3.14 \times 0.1150P=21×1.65×3.14×0.1150
=0.0297=0.0297=0.0297
P=2.5%P=2.5\%P=2.5%
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