Optical characteristics of a quantum-dot laser with a metallic waveguide.
We report the optical characteristics of a quantum-dot laser with a metal-coated waveguide, which shows a large group index of 4.2 compared to 3.2 for an uncoated laser. Temperature-dependent measurements reveal a high characteristic temperature in the temperature range of 7 degrees C-25 degrees C. The optical gain, refractive index change, and linewidth enhancement factor are extracted from the measured Fabry-Perot amplified spontaneous emission spectra. We use the pulse measurements to eliminate the thermal effect and obtain a low linewidth enhancement factor of 0.35.
Chang
Guo-En
GE
Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Lu
Chien-Yao
CY
Yang
Shang-Hua
SH
Chuang
Shun Lien
SL