List of Master thesis topics

Automated scanning detector for beam quality measurement in the mid-infrared Laser beam quality, often described by M2 parameter, is an important characteristic of a laser beam. The beam quality is determined from beam diameter measured along the beam propagation direction at several positions. The spatial distribution of beam power can be determined even with single point detector when the slit or blade is moved in front of the detector. The slit gradually blocks the beam. The dependence of power on slit or blade positions is used to determine the beam diameter. Such a system is favorable for mid-infrared wavelength range (2-8 µm), which gains in importance in recent years.
The aim of this work is to develop an automated system for beam quality determination. The system will use a scanning detector. The work includes the design of opto-mechanical layout, control of movable parts, signal processing, and evaluation.
Ing.Ondřej Slezák, Ph.D. ALD
Complex shape micromachining Advanced micromachining strategies for processing in 3, 4 and 5 axis combined with galvanometric scanners. Ing. Petr Hauschwitz,
Advanced glass processing and functionalization Advanced microscopic and diffraction or interference optical systems will be used for micro-drilling and cutting of glass and similar materials. In addition, functional micro and nanostructures will be developed for anti-reflection, superhydrophobic or oleophobic properties. Optical, SEM, and AFM analysis will be performed for the determination of optimal processing window and analysis of surface topography. Ing. Petr Hauschwitz,
Laser nanostructuring for medical applications State-of-the-art multi-beam and beam-shaping techniques will be utilized for the development of functional surface micro and nanostructures. These structures will be evaluated with respect to anti-bacterial or anti-microbial properties and cell growth with potential applications in a medical environment, dental and body implants. Ing. Petr Hauschwitz,
Self-cleaning surfaces by laser micro and nanostructuring The optimal combination of surface topography and chemistry will result in superhydrophobic properties on hard-to-process materials. These properties will be further tested for self-cleaning behavior by the fast camera and image analysis. Ing. Petr Hauschwitz,
Laser cleaning of PVD coatings The development and optimization of the cleaning process (laser stripping) of physical vapor deposited (PVD) coating. This is a great topic in terms of process optimization from the quality and speed point of view. Moreover by laser cleaning can be reached much more environmentally friendly process than techniques used so far. Ing. Jan Brajer, Ph.D. ILA
Cryogenic microchip nanosecond laser based on Ytterbium or Thulium doped laser materials The goal of this work is cryogenic microchip laser operation of Yb-doped and Tm doped solid-state materials at liquid nitrogen temperature. Laser materials such as Yb:YAG, Yb:Lu2O3, Yb:CALGO, Tm :YAP, Tm: Y2O3 etc. will be characterized at cryogenic temperatures with the different transmission of output coupling for CW laser operation. Nano second pulses will be generated using Saturable absorbers such as Cr:YAG, Cr:ZnS and Cr:ZnSe. The student who is involved will build and test the microchip cryogenic laser resonators by implementing and exploring the capabilities of the above materials. This study will lead to a deeper understanding of the fundamental physical processes of pulsed cryogenic lasers and eventually for real-world applications. Venkatesan Jambunathan, Ph.D. ALD
Passively Q -switched cryogenic Tm: Y2O3 oscillator The goal of this work is to generate nano second pulses from diode pumped Tm: Y2O3 laser using Cr:ZnS and Cr:ZnSe saturable absorbers. The student who is involved will build and characterize the pulsed Tm: Y2O3 cryogenic laser oscillator. This study will lead to a deeper understanding of the fundamental physical processes of pulsed cryogenic Tm: Tm: Y2O3 oscillator. Venkatesan Jambunathan, Ph.D. ALD
Cryogenic Yb:CALGO laser in the continuous wave and pulsed regime The goal of this work is to study this Yb-doped CALGO at cryogenic temperatures ( 80 K – 200 K). The student who is involved will build and test this cryogenic Yb:CALGO laser in the continuous wave and pulsed regime. This study will lead to a deeper understanding of the fundamental physical processes of this material. Venkatesan Jambunathan, Ph.D. ALD
Generation of Raman wavelength from fundamental wavelength using different Raman medium The goal of this work is to study to generate Raman wavelength from fundamental wavelength (1030 nm and/or 1932 nm) using various Raman medium such as KGd(WO4)2, Ba(NO3)2 etc. The student who is involved will build the Raman resonator and test the above-mentioned Raman medium. This study will lead to a deeper understanding of the fundamental physical processes of the Raman medium. Venkatesan Jambunathan, Ph.D. ALD
Mueller matrix polarimetry of complex laser systems Mueller matrix polarimetry is a powerful method for the analysis of complete polarization properties of optical systems. At HiLASE Centre this method is used to measure the thermally induced polarization effects like linear birefringence and diattenuations in individual optical elements as well as in very complex laser systems. The goal of the work would be the running of the polarimetric measurements, upgrades of the measuring method, e.g. its optimization in terms of systematic measurement errors and improvements of the automatization of the measurement, and also upgrades of the polarimetric data processing MATLAB codes. The final goal will be the complete mapping of the polarization propagation through individual parts of a complex high-power laser system which will be a new diagnostic tool used for the optimization of the laser performance. The results will be also used as benchmark data for the validation of the results from our numerical modeling of the thermos-optical effects. Ing.Ondřej Slezák,Ph.D. ALD
Laser based growth of 2D nanomaterials under vacuum conditions for direct printing functional devices via BB-LIFT The Master research will be devoted to a study of growth of nanomaterials on various types of substrates via Pulsed Laser Deposition (PLD). Recent studies have shown preliminary success for growth of a variety of 2D nanomaterials on thin films in a vacuum chamber by laser ablation and subsequent deposition on a substrate. However, the growth dynamics, influencing parameters and optimal conditions remain unexplored. The approach will also involve tests of printing of the deposited nanomaterials using Blister-Based Laser-Induced Forward Transfer (BB-LIFT) onto desired locations that is promising for fabrication of nanoelectonic devices. The research will include: developing the PLD technique for growth of nanomaterials and first tests of their transfer and printing. As a continuation of this work, fabrication of functional 2D optical and electronic devices, covering a complete cycle from generation of materials to positioning and testing of the nanodevices, could be feasible. Dr. Nathan Goodfriend SLA
Influence of laser beam size and wavelength in the determination of LIDT The laser-induced damage resistance of large optical components remains an important limitation for the maintenance costs, reliability, and the further development of high-energy laser systems. Traditionally, the laser-induced damage thresholds (LIDT) are performed on small samples and using small laser beam sizes (usually limited by the laser output), but these test results tend to be quite different if compared to the actual damage intensities when used with these high-energy lasers. Determination of the relation between testing beam size and the damage threshold value needs to be investigated for common optical path components – dielectric mirrors. Wavelength influence in the damage threshold value can be investigated only for the metallic or dichroic mirror. Mihai-George Mureșan, MSc., Ph.D. ILA

Choosing the right topic of the diploma work is the basis of success and one of the most important stages on the path to the successful completion of studies.
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