Abstract
This module will present the fundamentals of laser devices. The module will start with the Einstein equations, provide the conditions to have lasing and the characteristics of this lasing radiation. An introduction to the generation of laser pulses will be provided with the introduction of the mode locking and Q-Switching techniques. Finally the most common met laser systems in an undergraduate and postgraduate laboratories will be presented. Such systems are: diode lasers, He-Neon Lasers, Ti:Sapphire Lasers, Nd:YAG laser systems.
Glossary
Chapter One
Historical Review of Lasers, General Properties of Laser Light, Fundamental Building Blocks of a Laser Device
Chapter Two
Einstein Equations, Absorption of Light, Small gain coefficient, Threshold Point, Population Inversion, 3-level & 4-level energy laser systems, Population Inversion at threshold
Chapter Three
Examples of laser systems: (1) Helium Neon Laser; (2) Argon Ion Laser System; (3) Laser Diodes; (4) Nd:YAG; (5)Copper Vapor; (6)Dye Laser
Chapter Four
Emission Linewidth, Broadening Mechanisms: Inhomogeneous and Homogeneous Broadening Mechanisms, The Lineshape function
Chapter Five
Absorption/Emission Cross Section, Gain Saturation
Chapter Six
The Resonator, Resonator Modes: Longitudinal Modes & Transverse Modes, Resonator Stability Condition
Chapter Seven
Matrix Optics
Chapter Eight
Gaussian Optics, Spatial Hole Burning, Ring Cavities
Chapter Nine
Coupled Rate Equations, Q-Switching: Passive & Active, Mode – Locking: Active & Passive
Learning Outcomes
- Learning Fundamentals of Lasers
- Learning Fundamental Lasers Systems
Bibliography
1. Laser Fundamentals by W.T. Silfvast, Cambridge University Press
2. Laser Physics, S. Hooker & C. Webb, Oxford University Press
3. Principles of Lasers, O. Svelto
4. Laser Lecture Notes, University of St-Andrews
External Evaluator
Prof. Graham Turnbul (St-Andrews)
Responsible Academic
Associate Prof. Konstantinos Petridis (TEI of Crete)
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