Question

Raman and Brillouin scattering are usually observed at
1. Low optical power densities
2. Medium optical power densities
3. High optical power densities
4. Threshold power densities

Answer 1

Correct Answer - Option 3 : High optical power densities

Raman and Brillouin scattering mechanism are non-linear. They provide optical gain but with a shift in frequency, thus contributing to attenuation for light transmission at a particular wavelength. They can be seen at high optical power densities.