Distributed feedback lasers

This chapter presents distributed feedback (DFB) and distributed Bragg reflector (DBR) lasers, which maintain stable single-mode oscillation even under high-speed modulation. They are suitable for monolithic integration and accomplishing advanced functions and performances. After the concepts of the dynamic single-mode lasers are outlined, the fundamental theory based on coupled-mode equations is explained. Then, characteristics of DBR and DFB lasers are discussed in some detail.