Impact of Gain Medium Dispersion on Stability of Soliton Bound States in Fiber Laser

Effect of the gain medium dispersion on stability of soliton groups in fiber laser has been studied. An attractive force produced by bi-temporal saturable absorber is used to enhance the soliton interaction and results in a firm bound state formation. It is found that active media supporting soliton formation causes irregular bunching in the fiber cavity, while the gain media with normal non-soliton dispersion demonstrates stationary bound state soliton generation. The results provide guidelines for the synthesis of an optimal dispersion map for soliton fiber lasers.