Figure 3
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Fourth-order 100 GHz colliding pulse mode-locked InAs/GaAs QD laser (CPML) on GaAs (001). (A) Schematic of the passive 4th-order MLL. (B) Optical spectra evolutions with the temperature increasing from 20°C to 100°C. (C) Optical spectrum of flat-top QD-CPML under optimized bias condition. (D) 70 G NRZ and 40 Gbaud PAM-4 optical eye diagram using comb line at 1321.28 nm.
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