Efficient high-temperature CW lasing operation of oxide-confined long-wavelength InAs quantum dot lasers

Abstract
Efficient, continuous-wave lasing operation of narrow-stripe, oxide-confined, long-wavelength InAs quantum dot lasers in the ground state (λ ≃ 1.28 µm) has been achieved at temperatures up to 100°C. The lasers have a very low threshold current density (Jth = 24 A/cm2), high differential quantum efficiency (55%), and very low internal loss (αi = 0.77 cm-1).