Interaction of self-modulation and relaxation oscillations, and its role in nonlinear dynamics of a solid-state ring laser

摘要

Theoretical and experimental investigations were made of the frequency of relaxation oscillations and of the operational dynamics of a solid-state ring laser when the frequency of self-modulation oscillations was varied within a wide range by altering one of the feedback coefficients of counterpropagating waves. He generally accepted formula for the relaxation frequency ω_r=[(ω/Q)η/T_1]~1/2 is valid only in the limited range of self-modulation oscillation frequen- cies; here, ω/Q is the cavity bandwidth, η is the excess above the pumping threshold, and T_1 is the relaxation time of the population inversion.