Fig. 1. Schematic of a three-turn MCR.

Fig. 2. Evolution of resonant modes in a three-turn MCR over a period of coupling factor cos(2K) when (a) γ = 1/(2^1/20) and (b) γ = 1/(2^1/2).

Fig. 3. Transmission spectra of different resonance modes in a three-turn MCR at different coupling conditions when γ = 1/(2^1/20) and γ = 1/(2^1/2).

Fig. 4. (a) Group delay and (b) group delay dispersion under white-light resonant conditions.

Fig. 5. (a) Coupling state versus loss for achieving the white-light resonance effect and (b) the dependence of white-light resonance depth on the coupling state.

Fig. 6. The dependence of split phase difference and resonance depth of mode splitting on coupling parameter when (a) γ = 1/(2^1/20) and (b) γ = 1/(2^1/2).