The student will gain an overview of the properties of materials for LED and LD structures and their dependence on temperature and other quantities. They will learn how to properly design the cooling of electronic devices for the needs of temperature-sensitive devices. They will learn about the properties of optical materials used for the construction of optical fibers, diffusers, filters, and sensors. As part of the sensors, they will also learn about the possibilities of detecting optical radiation outside the visible spectrum and its use in practice. Likewise with the possibilities of non-communication use of optical fibers for sensory applications. The student will learn common 3D printing technologies, from the process of choosing a suitable material, through the design 3D model, to the 3D printing itself.