435 phys

Absorption and emission of light, Einstein Relations,
Population inversion, Gain coefficient, Optical cavity,
Modes of laser cavity. Solid-state lasers,
Semiconductor lasers, Gas Lasers, Dye lasers, Free
electron laser and some new lasers. Laser beam
properties: Laser Line width, Beam Divergence,
Coherence, Brightness, Focusing properties of laser,
Q-Switching, Frequency Doubling, Phase
Conjugation. Laser Applications: Medical application,
Industrial application, Military application, Scientific
application, Holography and communications.