Introduction to Laser Technique

It is not possible to register for the course 12ULTB if the student is concurrently registered for or has already completed the course 12ULT (mutually exclusive courses).

It is not possible to register for the course 12ULTB if the student is concurrently registered for or has already completed the course 12ULAT (mutually exclusive courses).

It is not possible to register for the course 12ULTB if the student is concurrently registered for or has previously completed the course 12ULAT (mutually exclusive courses).

Garant předmětu:

Lecturer:

Tutor:

Supervisor:

Department of Physical Electronics

Synopsis:

Overview of electromagnetic radiation sources; laser principle; classification of lasers; characterization and rough application of various types of lasers; laser safety precautions. The laser amplifier, Q-switching, mode-locking.

Requirements:

Basic course of physics.

Syllabus of lectures:

Light as electromagnetic radiation; a substance as a set of quantum systems; the interaction of light with matter, detection. Conventional optical sources. The principle of laser; laser classifications; solid state lasers; liquid lasers; gas lasers; plasma lasers; semiconductor lasers; basic laser application. Laser safety precautions.Oscillator, amplifier, Q-switching, mode-locking.

Syllabus of tutorials:

1.Basic concepts related to optical and electromagnetic radiation spectrum

The relationship between wavelength and frequency.

2.Open resonators. The stability of the open resonator.

3.Boltzmann distribution, population inversion, energy levels. Interaction of light with

matter: absorption, spontaneous emission and stimulated emission.

4.Detection of optical radiation: the external and internal photoelectric effect.

5.Test.

6.Calculation of the laser threshold conditions. Gain coefficient and the coefficient of losses.

7.Generation of laser radiation, the threshold gain active medium, extractable energy

of the active medium, the photon lifetime, the resonator quality factor.

8.Examples of most important characteristics of lasers in various categories.

9.Solid state lasers. Calculation of the laser efficiency, laser output power. 3 - and 4-

level model of the laser. Application of solid-state lasers.

10.Gas laser. Examples of gas lasers in various categories. Application of gas lasers.

11.Dye lasers, examples. Characteristics of semiconductor lasers.

12th Oscillator, amplifier

13th Q-switching, mode-locked.

14.Test

Study Objective:

Knowledge: laser oscillator, the threshold condition for generation of radiation, gain, losses, categorization of lasers, laser applications, safety regulations

Skills: the principles of laser radiation understanding; determination of the laser system basic components, different types of lasers and their applications, safety rules for working with lasers.

Study materials:

Key references:

[1] Ch.C. Davis, Lasers and Electro-optics: Fundamentals and Engineering, Cambridge, Cambridge University Press, 2014.

[2] H.J. Eichler, J. Eichler, O.Lux, Lasers -Basics, Advances and Applications, Springer-Verlag Berlin, 2018.

Recommended references:

[3] R. Paschotta, Encyclopedia of laser physics and technology, Wiley-VCH, Berlin 2008

[4] K. Barat, Laser Safety: Tools and Training, CRC Press, 2017

[5] W. Köchner, Solid-State Laser Engineering, Springer-Verlag Berlin Heidelberg New York 1999

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Fyzikální inženýrství - Počítačová fyzika (elective course)
• Fyzikální inženýrství - Fyzika plazmatu a termojaderné fúze (PS)
• Fyzikální inženýrství - Laserová technika a fotonika (compulsory elective course)
• Physical Engineering - Computational physics (elective course)