Fig. 1. Constructed structural models of micro-resonators with different edge shapes and the corresponding curves of group velocity dispersion and wavelength

Fig. 2. Fabricated MgF₂ crystal micro-disk resonators

Fig. 3. Experimental setup to test the performance of resonators and generate Kerr combs in different resonator

Fig. 4. Transmission spectrum of resonator R1 and R2

Fig. 5. Experimental observation results of the Kerr primary comb generation process when adjusted the pump frequency detuning from blue detuning to red detuning

Fig. 6. Optical Kerr comb spectra generated separately from resonator R1 and R2