Individual
course details |
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Study programme |
Physics |
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Chosen research area (module) |
General
physics |
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Nature and level of studies |
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Name of the course |
Physics
of Lasers and Ionized Gases |
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Professor (lectures) |
Milorad
Kuraica |
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Professor/associate (examples/practical) |
Bratislav
Obradovic |
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Professor/associate (additional) |
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ECTS |
5 |
Status
(required/elective) |
requred |
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Access requirements |
All
exams from 1. 2. and 3. year of study. |
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Aims of the course |
Through
theoretical lectures, demonstration and experimental exercises, students will
be able to understand the physical processes which are behind the work of
laser, as well as different laser systems. Also students will be introduced
to the processes responsible for electrical breakdown in gases and
establishing different kinds of gas discharges at broader range of pressures.
It will be presented examples of laser applications and various types of
discharges in solving technical, technological and environmental problems.
This course are the basis for increasing of knowledge and skills necessary
for further research in this field. |
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Learning outcomes |
Adopting
basic concepts related to the physical principles on which lasers. Understanding and introducing to the basic
types of lasers and the way they work. Adoption of basic concepts related to
physical processes that lead to breakdown in the gas and to the establishment
of discharges at reduced and atmospheric pressure. Introduction to basic
applications of lasers and electric gas discharges . |
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Contents of the course |
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Lectures |
1.EM
field in the cavity (density of mods, Plank’s black body radiation law). 2.
Stimulated emission, Einstein coefficients, spectral line broadening. 3.
Absorption and amplification of radiation. 4. Population inversion and
methods of achieving; Progressive wave amplifier. 5. Regenerative amplifier,
laser oscillator. 6. Confocal resonator; Solid State Lasers: Ruby Laser, Nd
Lasers; Liquid laser with organic dyes. 8. Gas lasers: He-Ne laser, CO2
lasers. 9. Chemical lasers; Semiconductor lasers. 10. Q-switch techniques.
11. Laser protection. 12. Formation and disappearance of charged particles in
gases and on electrodes 13. Cross-sections for collisions, frequency of
collisions, transport processes 14. Diffusion, ambipolar diffusion. 15.
Townsend regions T1 and T2. 16. T3 region and breakdown, breakdown voltage
and Pashen curve. 17. Glow discharge, cathode region, normal and abnormally
glow discharge. 18. Arc discharge, corona. 19. Barrier Discharges 20. Debye
screening theory. Plasma frequency |
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Examples/ practical classes |
Demonstration
exercises: 1.Longitudinal modes of He-Ne lasers 2. Longitudinal modes for semiconductor
lasers. 3. Ruby and Nd lasers. 4. Carbon dioxide laser. 5. Semiconductor
lasers. 6. Breakdown in gas and Pashen’s curve.7. Glow discharge, characteristic regions, V-A characteristic.
8. Corona and dialectical barrier discharge. |
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Recommended books |
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1 |
Коњевић
Н., Увод у
квантну
електронику
- ласери,
Научна
књига,
Београд, 1981. |
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2 |
N.V.Karlov
- Lectures of Quantum Electronics, Mir Publisher Moscow, 2000 |
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3 |
Лабат
Ј., Физика
јонизованих
гасова,
Београд 1991. |
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4 |
Yuri
P. Raiser, Gas Discharge Physics, Springer-Verlag, Berlin-Heidelberg, 1991 |
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5 |
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Number of classes (weekly) |
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Lectures |
Examples&practicals |
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Student
project |
Additional |
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3 |
2 |
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Teaching and learning methods |
Lectures,
demonstrations, seminar work, experimental exercises. |
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Assessment (maximal 100) |
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assesed coursework |
mark |
examination |
mark |
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coursework |
5 |
written
examination |
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practicals |
25 |
oral
examination |
50 |
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papers |
20 |
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presentations |
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