Figure 2
From: Efficient, high-power, narrow-linewidth, continuous-wave quantum-dot semiconductor comb laser
Optical spectrum of: (a) a 1.6 mm 25G comb laser at 500 mA with 84 consecutive modes ≥ 1.5 mW at −3.5 V absorber bias; (b) a 0.83 mm 50G comb at 300 mA with 31 consecutive modes ≥ 2 mW (18% PCE) at −5 V absorber bias; (c) a 0.4 mm 100G comb at 85 mA with 12 consecutive modes ≥ 1 mW (15% PCE) at 0 V absorber bias; (d) threshold current density of the 25G comb laser versus absorber reverse-bias voltage. Absorber lengths are 10% of respective cavity lengths.
