The course is aimed at broadening the understanding of modern laser applications in nanophotonics and optoelectronics for students with basic knowledge in laser physics, optics, and solid-state physics. The first part of the course introduces the basic principles of laser light sources, including ultrashort pulse lasers and nanolasers. The second part of the course provides an overview of laser applications in nanophotonics and optoelectronics. In particular, examples of local optical heating and nanothermometry, ultrafast modulators and optical signal converters, and various laser-based nanofabrication methods are considered. The final part of the course provides a detailed introduction to thin-film optoelectronics. An important feature of the course is its practical focus, which will allow students to use their fundamental knowledge in real industrial projects.