Introduction and History of Quantum Dot Lasers

The concept of quantum dot (QD) lasers and their advantages were predicted in the 1980s, and considerable efforts have been devoted to developing high-performance QD lasers. The current QD lasers exhibit low-threshold currents, high-temperature operations, and wide spectra. In addition, QD lasers are expected to act as optical sources in integrated photonic circuits, such as Si photonics. This chapter introduces and discusses the research and development history of QD lasers.