Laser Fundamentals: Applications and Technologies

This lecture covers the fundamentals of laser technology, including the history, operation, and various applications of lasers. It begins with an introduction to basic laser principles such as gain, absorption, spontaneous and stimulated emission. The instructor discusses different types of laser systems, including gas lasers like CO2 and Ar-ion lasers, and solid-state lasers such as Nd:YAG and disk lasers. The lecture emphasizes the importance of beam quality and its applications in fiber coupling and manufacturing. The instructor also explains the concept of laser printers, detailing how lasers are utilized in the printing process through electrostatic principles. Additionally, the lecture explores advanced topics such as ultrafast lasers, non-linear frequency conversion, and the significance of beam parameter products in evaluating laser performance. Throughout the session, the instructor provides examples and applications relevant to engineering, ensuring a comprehensive understanding of laser technology and its industrial relevance.