FISICA DEI LASER

Degree course: 
Corso di Second cycle degree in PHYSICS
Academic year when starting the degree: 
2016/2017
Year: 
1
Academic year in which the course will be held: 
2016/2017
Course type: 
Compulsory subjects, characteristic of the class
Credits: 
6
Period: 
First Semester
Standard lectures hours: 
48
Detail of lecture’s hours: 
Lesson (48 hours)
Requirements: 

Basic notions of electromagnetism and quantum physics.

Final Examination: 
Orale
Assessment: 
Voto Finale

The student should be able to give a physical explanation of the laser dynamics, and should be able to describe how a laser works in different regimes.

-Introduction, spontaneous and stimulated emission, pumping schemes and laser properties
-Radiation-matter interaction: black body theory, spontaneous emission, absorption and stimulated emission, Line broadening mechanisms, non-radiative decay.
-Energy levels, radiative and non-radiative transitions in molecules and semiconductors
-Passive optical resonators
-Pumping processes
-Laser behaviour in continuous regime, Rate equations, 4 level laser and 3 level laser.
-Transient behaviour of the laser: Q-switching, gain switching, model-locking and methods of mode-locking
-Examples of lasers: solid state lasers, dye lasers, semiconductor lasers, gas lasers
-Laser beam properties
-Transformation of laser beams: propagation, amplification, frequency conversion, pulse compression and pulse expansion.
-Examples of laser applications

Lectures will be held in classroom.

Principles of lasers, Orazio Svelto, IV edition
(Few lectures will be based on the book “Quantum Electronics” by Yariv, III edition)