Fig. 1. L-G rotating cavity system model

Fig. 2. Real and imaginary parts of εT+ and εT- varying with normalized detuning. (a) First-order linear absorption and dispersion curves; (b) third-order nonlinear absorption and Kerr coefficient curves

Fig. 3. Kerr coefficient and absorption coefficient varying with normalized detuning at different OAMs and input powers. Kerr coefficient varying with (a) OAM and (b) input power; third-order nonlinear absorption varying with (c) OAM and (d) input power; first-order linear absorption varying with (e) OAM and (f) input power

Fig. 4. Fast-slow light phenomena of transmitted and reflected signal lights in L-G system. (a) Group delay of transmitted signal light varying with input power; (b) group delay of reflected signal light varying with input power; (c) maximum group delay of transmitted light and corresponding input power varying with OAM; (d) maximum group delay of reflected light and corresponding input power varying with OAM