Other Student Projects

Our Institute, in cooperation with the Open Science project, offers several topics for secondary school students for their student works.

The topics are:

1. Accurate timekeeping
2. Preparation of InP layers of liquid microchannel epitaxy and study of their properties using an electron microscope
3. Measurement of the electrical properties of semiconductor washers with micropores
4. Verification of the possibility of using such structures as gas sensors
5. Measurement of the influence of the anisotropy of the pores of the semiconductor sensitivity to various gases and use of this effect to the selective function of the sensor
6. The calculation of the real and imaginary components of impedance RC model with a dispersed parameters microporous structure
7. Topography measurements of thin films skutterudites by scanning with a tunneling microscope
8. Achieving ultra-high vacuum
9. Programming a feedback device for the process of pulling optical fibers

In case of interest, please contact Adéla Michková at: michkova@ufe.cz, or call: +420 266 773 429.

Other projects:

The development of a fiber-optic temperature sensor

Industrial - academic cooperation

Temperature can be measured by a variety of methods, of which the fiber-optic approach can have many advantages and often is the only irreplaceable method. The proposed arrangement of the temperature sensor is based on the characterization of the temperature dependence florescence of inorganic phosphors fixed in various ways to / from an optical fiber.

The main goal is to achieve good repeatability and reproducibility of production probe measurements. The work includes the characterization of fiber probes and their fluorescence properties and researching the optimal method of phosphor fixation. The default layout is sticking disc phosphors onto the fiber end.

A substantial part of the work will be carried out in the company Safibra (www.safibra.cz) in Ricany. Knowledge of the basics of working with optical fibers is assumed, suitable for group Bc +.

Effects of methodology for the preparation of active optical fibers on their luminescent properties

Supervisor Jan Mrázek, Ph.D. , student Jakub Cajzl, MSc. (VŠCHT)

Currently, research focused on the preparation of active optical fibers is directed to the preparation of nanocrystalline (glass - ceramic) materials which is present in the core of the optical fiber. Nanocrystalline core structures improve the attribute of the optical fiber. The processing temperature exceeds 2000 ° C when preparing active quartz optical fibers. This results in change in the processing of the original crystalline structure of the core. Due to the relatively low concentration of dopants in the preforms, conventional analytical methods such as XRD , XPS , Raman spectroscopy and the like fail. Therefore, the structural arrangement of information dopants in the preforms and fibers and the fibers can be obtained by spectroscopic methods only in the UV -VIS and NIR spectral region.

The aim is to compare the influence of the methodology of preparation of optical fibers on their spectroscopic properties. A secondary goal of this work is to develop a methodology for measuring the attenuation of optical fibers in the UV -VIS spectrophotometer Fluorolog area and compare it with conventional absorption spectrometers.

Samples of four optical fibers doped with erbium ions and aluminum prepared by different technological processes will be analyzed as part of the work. The processes differ in methodology in the doping of Al and Er .

Preparation and Characterization of ITO films prepared by the deposition of colloidal solutions

Supervisor: Jan Mrázek, Ph.D.

The aim is to find optimum parameters for the preparation of transparent ITO layers with low resistivity for applications in optics and photovoltaics.

The work will consist of the preparation of ITO layers of colloids on a planar glass fiber substrates by dip-coating. The prepared samples will be studied based on their mechanical and electrical properties depending on the conditions of deposition and thermal-chemical treatment in the temperature interval of 100-600 ° C. The results will be compared with layers prepared by vacuum sputtering and commercially available samples.

Characterization and optimization of parameters for drawing hollow fibers

Supervisor: Ing. Ondřej Podrazký, Ph.D.  

The goal is to find the dependencies between the dimensions and process parameters (temperature, pulling speed, pressure) necessayry for the preparation of hollow fibers.

The work will include familiarization with the process of drawing fibers, service of the breaking device, work with an optical microscope with a digital camera and a detailed characterization of capillary dimensions or, if necessary, microstructure fibers and finding a relationship between the drawing process and the geometry parameters of capillary fibers.

Professional internships at the Institute of Photonics and Electronics of the AS CR in the Laboratory of Optical Fibers

Supervisors: Ing. Ondřej Podrazký, Ph.D., Soňa Vytykáčová (VŠCHT, Laboratory of RNDr. Špirková and Dr. Nekvindová)

The internship will include the following:

1. occupational safety, particularly with regard to dealing with HF and rotating machines
2. invited lecture and discussion with MM Bubnov and EM DIANOVA - Fiber Optic Research Centre (Russian Academy of Science)
3. excursion together after work to IPE at Kobylisy (main building), the laboratories of surgical lasers and nonlinear optics , optical SPR sensors , nanolithography .
4. sample preparation of thin - films by MCVD preforms for optical fiber drawing
5. basics of optical fibers: decladding, cleaving, connectoring, splicing
6. participation at 1-2 campaigns of optical fibers, i.e. hollow-core fibers
7. characterization of optical capillaries = sizing hollow waveguides and optical microscopy analysis of the effect of internal pressure when pulling on the dimensions of the capillaries . The result of this part is followed by the final report following the work of our colleague R. Krajcar. The results will be the technological basis for the drawing of Bragg fibers ( project 2163).