Review of some basic concepts and principle of laser
Introduction to light and its properties: Reflection, refraction, interference, diffraction and polarization. Photometry – calculation of solid angle. Brewster’s law. Snell’s law and, its analysis.
Introduction to LASERS: Interaction of radiation with matter – induced absorption, spontaneous emission, stimulated emission. Einstein’s co-efficient (derivation). Active material. Population inversion – concept and discussion about different techniques. Resonant cavity.