Tunable three-section, strained MQW, PA-DFB's with large single mode tuning range (72 A) and narrow linewidth (around 1 Mhz)

Tunable three-section, phase-adjusted DFB’s with a strained MQW active layer were realized. The paper describes the fabrication and the measured device characteristics. This includes a description of the operating principles, driving conditions and e.g. (measured) mode-boundaries in the three-dimensional space of the three driving currents.