This tutorial discusses the main issues of generation in fiber lasers, pumping methods. Presented active elements for fiber activation and laser transition circuit. Features of fiber laser resonators on Bragg lattices and methods for obtaining . are described Energy and space-time characteristics of fiber lasers operating on rare earth elements are given Prospects for the development of fiber lasers . The main types of fiber lasers used in technologies are given, the types of focusing heads are presented and some technologies for the application of fiber laser radiation (cutting, welding, microprocessing) are considered. For students of higher technical educational institutions of engineering specialties in the field of training "Engineering" and "Design of technological machines and complexes" . ;Griff:Accepted by the UMO of universities on university polytechnic education as a teaching aid for students of universities studying in the direction of training "Mechanical Engineering"