Figure 6

For nested type: (a1) The variation of transmission output intensity as function of \(\Delta {}_{{1}}\) and input intensity \(I_{i}\). (b1) The change trend of transmission output intensity with probe input intensity \(I_{i} /\Gamma_{20}^{2} = 100,200,500\) from inside to outside. (c1) The variation relationship of transmission output intensity with detuning \(\Delta_{1} /\Gamma_{20} = 15,16,17\) from right to left. (d1) The relationship of input intensity with detuning \(\Delta_{1}\). Right OB threshold (blue dot), left OB threshold (purple dot). For cascaded type: (a2) The variation of transmission output intensity as function of \(\Delta {}_{{1}}\) and input intensity \(I_{i}\). (b2) With input intensity \(I_{i} /\Gamma_{20}^{2} = 100,200,500\). (c2) With \(\Delta_{1} /\Gamma_{20} = 3,3.5,4\). (d2) The relationship of input intensity with detuning \(\Delta_{1}\). The other parameters are \(G_{2} = 10\,{\text{MHz}}\), \(G_{3} = 10\,{\text{MHz}}\), \(\Delta_{2} /\Gamma_{20} = 10\), \(\Delta_{3} /\Gamma_{20} = 10\), \(\Delta_{ac} = 0\,{\text{MHz}}\), \(G_{2} = 10\,{\text{MHz}}\), \(G_{5} = 10\,{\text{MHz}}\), \(\Delta_{2} /\Gamma_{20} = 10\), \(\Delta_{5} = 0\,{\text{MHz}}\), \(\Delta_{ac} = 0\,{\text{MHz}}\).