The goals of this course are: to provide students with the fundamentals of laser physics, and enable them to successfully apply lasers in their respective disciplines; to give students an understanding how to successfully achieve results combining knowledge gained from different disciplines (in the course students see how the elements from electro-magnetism, quantum physics, semiconductor theory and electronics are brought together and applied to the field of lasers); help students to develop critical thinking skills; to prepare students for careers in high-tech industries.
- Describe the interaction of light with matter using classical and semi-classical theories.
- Explain the operation of laser rezonator and laser theshold.
- Explain the special properties of laser radiation compared to more conventional sources.
- Explain the meaning of Q-switching and mode-locking in puls lasers.
- Understan how the choice and characteristics of laser materials and rezonator determine the ultimate behavior of a laser.
- Analyising the properties of laser determine possible applications.
- Evaluate the multi-disciplinary nature of engineering systems.
Forms of Teaching
The examples are solved during the lectures.Laboratory Work
Laboratory experiments are on Department of applied physics. Laboratory is mandatory. Laboratory: 1. Index of refraction (deviation of laser beam on prism). 2. Absorption coefficient of solution (laser power measurements). 3. Measurement of diameter of laser beam. 4. Faraday effect.Consultations
Consultations are held in arrangement with the professor.Seminars
Seminar is mandatory.Internship visits
Visit the company Dok-ing and Institut of physics. (if possible)
|Type||Threshold||Percent of Grade||Comment:||Percent of Grade|
|Laboratory Exercises||0 %||20 %||0 %||20 %|
|Class participation||0 %||5 %||0 %||5 %|
|Seminar/Project||0 %||15 %||0 %||15 %|
|Mid Term Exam: Written||0 %||30 %||0 %|
|Final Exam: Written||0 %||30 %|
|Exam: Written||0 %||32 %|
|Exam: Oral||32 %|
Week by Week Schedule
- Characteristics of light radiation: wave-particle duality of light. Introduction: basic elements of lasers. Laser cooling of atoms.
- Quantum model of atom. Quantum numbers. Selection rules. Light emission and absorption. Examples.
- Widths and profiles of spectral lines. Lorentz model of absorption and emission. Doppler line broadening. Examples. Expriment: atomic and molecular spectra.
- Collisional line broadening.Termal radiation and Plancks law. Einstein probability of spontaneous, stimulated emission and absorption. Examples.
- Population inversion in three and four-level laser. Electro-magnetic waves in cavity. Spectral mode density. Fabri-Perot interferometer. Examples.
- Treshold condition. Gain saturation. Modes of laser resonators: Gauss, Hermite-Gauss, Laguerre-Gauss and Bessels modes. Examples.
- Multilayer dielectric coatings. Laser resonators: stable and unstable. Quality factor of laser resonator.
- Midterm exam.
- Excitation of laser medium. Optical pumping. Electron excitation. Second-order collisions. Sngle-mode lasers. Spectral resolving power of prism, optical grating and Fabry-Perot etalon. Examples.
- Multimode lasers. Puls lasers (Q switching, mode coupling). Spectral characteristic of laser radiation: monochromaticity, directionality, spectral brightness, coherence time and length. Puls kasers. Maser. Lasers with gaseous medium: He-Ne, Ar+ ion.
- N2 laser. Molecular spectra. CO2 laser.
- Excimer lasers: ArF, KrF. Chemical lasers. Dye lasers. Solid-state lasers (ruby, Nd: YAG, fiber). Tunable solid-state lasers.
- Semiconductor lasers (GaAs). X-ray lasers. Free-electron lasers. Fiber lasers, Detectors of laser radiation.
- Holography. Recording and reconstruction of hologram. Matematcal description. Hologram types. Hologram recording materials. Applications: interferometry, optical data processing, holographic memories.
- Final exam.