Asymmetric multiple-quantum-well laser diodes with wide and flat gain spectra were designed, fabricated, and analyzed. The active layer was composed of three 10-nm, one 8-nm, and two 6-nm 0.5% compressive strained wells and four 10-nm and one 5-nm 0.4% tensile strained barrier layer. Measured spectra of antireflection-coated ridge waveguide laser diodes with such quantum-well structures have shown that -1-dB spectral gain bandwidth can be as large as 90 nm.
© 2003 Optical Society of America
Oh-Kee Kwon, Kang-ho Kim, Eun-Deok Sim, Jong-Hoi Kim, Hyun-Soo Kim, and Kwang-Ryong Oh, "Asymmetric multiple-quantum-well laser diodes with wide and flat gain," Opt. Lett. 28, 2189-2191 (2003)