Fig. 1: Static QD laser performance characterization.
From: Exploring the feedback limits of quantum dot lasers for isolator-free photonic integrated circuits
a Cross-sectional SEM of the device structure. b Histogram of Jth for all tested lasers, with the majority falling between 200 and 300 A/cm². c Maximum single-side GS CW lasing output power versus drive current; The dashed line represents the best fit with a slope of 0.152 W/A. Inset shows L-I-V characteristics and the wall-plug efficiency (WPE) of a laser achieving 102 mW maximum single-side GS power. d L-I-V characteristics and emission spectrum at 3 × Ith bias of a device used in the subsequent feedback dynamic measurements. e Measured αH as a function of wavelength. The inset shows net modal gain at various subthreshold currents. f RIN spectra at two power levels
