Collisions between two dissipative optical bullets separated in space

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2011,（11）
• 页码范围: 10-13
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201109.100602

摘要

We present the numerical results of both head-on and non-head-on collisions between two stable dissipative optical bullets (DOBs) in a three-dimensional complex Ginzburg-Landau equation with cubic-quintic nonlinearity.The system parameters chosen are in the coexistence regions for both stationary DOBs and double bullet complexes (DBCs).By varying the initial velocities v and the impact parameters P which represent the distance between the parallel trajectories of colliding bullets,we observe three generic properties of the bullets:fusion,fission,and quasi-elastic collisions.A novel and interesting behavior is observed in the results,in which two or three DBCs occur in non-head-on collisions at intermediate values of v.Recently,the concept of the dissipative soliton,which is rooted in the classical soliton theory,the nonlinear dynamics theory of bifurcations,and the concept of selforganization proposed by Prigogine,has received increased attention[1].Dissipative solitons are recognized as fixed localized solutions resulting from a double balance:between dispersion and nonlinearity on one hand and between gain and loss on the other hand.Taking fiber laser as an example,the high-order vector soliton[2]and the dissipative dark soliton[3] occur as the balance between laser gain saturation and output loss,and the balance between cavity dispersion and the fiber nonlinear Kerr effect.Further,all dissipative solitons can only survive in the presence of a continuous energy supply.