Attention!

Kindly go through the following topics in the Unit V

1. Einsteins coefficients derivations

2. He-Ne laser

3. Nd:YAG laser

4. Principle of Fibre optic communication(total internal reflection)

5. Acceptance angle and Numerical aperture derivation

6.Classification of optical fibre(based on No. of modes and Ref.index)

7.Pressure sensor