Laser Physics
Tampere University
Core content
· Basic structure of a laser
· Properties of a laser beam:
· · Coherence
· Directionality
· Monochromaticity
· Brightness
· Fundamental interactions between light and matter
· · Fundamental processes
· 2-, 3-, and 4-level systems
· Population inversion
· Semiclassical theory of light-matter interaction
· Broadening mechanisms
· Saturation of absorption and gain
· Optical resonators properties
· · Ray optics approach to optical resonators
· Fabry-Perot interferometer
· ABCD matrices
· Stability of an optical resonator
· Quality factor and cavity lifetime
· Paraxial Optics and Gaussian beams
· · Paraxial approximation
· Fundamental Gaussian beam
· Higher-order modes and cavity symmetry
· Continuous wave laser operation
· · Rate equations
· Conversion efficiency
· Optimisation of output power
Complementary knowledge
· Coherence
· Saturation effects
· Propagation of Gaussian beams
· Modes characteristics inside resonators
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