Laser physics is a branch of physics that focuses on the study, design, and application of lasers. A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. Research in laser physics involves the study of the fundamental principles of how lasers work, the development of new types of lasers with unique properties, and the application of lasers in various fields such as telecommunications, medicine, materials processing, and scientific research. Topics of study in laser physics include laser theory, laser design and construction, laser interaction with matter, and the development of novel laser technologies. Overall, laser physics plays a crucial role in advancing technology and scientific knowledge in a wide range of fields.