Lecture
This lecture covers the physics and applications of semiconductor lasers, focusing on topics such as optical gain, carrier injection, and heterostructure design. It discusses the principles behind laser operation, including population inversion and threshold current. The lecture also explores different types of semiconductor lasers, such as homojunction and double heterostructure lasers, and their characteristics. Additionally, it delves into the physics of quantum well lasers and the importance of optical confinement. The presentation concludes with a discussion on short pulse laser generation techniques, including active and passive mode-locking. Students will gain insights into the fundamental concepts and practical applications of semiconductor lasers.