Fig. 6.
Full LLE simulation with the thermal effect included for the same Si3N4 microring studied in Fig. 5. The pump power and the effective thermal conductance Keff are varied for four cases: (a) pump power of 40 mW and Keff = 0.6; (b) pump power of 40 mW and Keff = 0.06; (c) pump power of 80 mW and Keff = 3.8, and (d) pump power of 80 mW and Keff = 3.6. For each case, in the left figure we show the pump transmission as a function of the laser wavelength detuning, which is gradually increased from the blue side of the pump resonance and its variation speed is slow compared to the thermal dynamics in the cavity. In the right figure we plot the temporal evolution of the pump transmission and the cavity temperature relative to the ambient environment by fixing the laser wavelength detuning at the position marked by the vertical arrow in the pump transmission.