Question

For a SI fiber refractive indices of core is 1.44. Calculate the acceptance angle in air for skew rays that change direction by 1200 at each reflection at core cladding interface

Answer 1

Answer:

The refractive indices of core and cladding materials of a step index fibre are 1.48 ... Calculate: (i) numerical aperture, (ii) acceptance angle, and (iii) …

Answer 2

0.30

Here,μ1=1.50;μ2=1.47;μ0=1(i) Critical angle θc at the core-cladding interface is given by     θc=sin−11.501.47=78.50(ii) Numerical aperture,NA=(μ12−μ22)21       =[(1.50)2−(1.47)2]21=(2.25−2.16)1/2=0.30(iii) Acceptance angle θa=sin−1(NA)

Here,μ1=1.50;μ2=1.47;μ0=1(i) Critical angle θc at the core-cladding interface is given by     θc=sin−11.501.47=78.50(ii) Numerical aperture,NA=(μ12−μ22)21       =[(1.50)2−(1.47)2]21=(2.25−2.16)1/2=0.30(iii) Acceptance angle θa=sin−1(NA)=sin−1(0.30)=17.40