Compton散射下多信道平面光波导的空间光孤子开关

应用量子微扰理论和多光子非线性Compton散射模型,对Compton散射下多信道平面光波导的空间光孤子开关进行了研究.结果表明:在横向具有正弦形周期折射率调制的非线性平面光波导的多信道系统中,原先束缚在一个信道中的孤子可以靠由入射和散射光形成的耦合控制光点,通过交叉相位调制横向吸引孤子波束,使孤子从原信道切换到邻近信道,从而实现光孤子开关的功能.控制光点可由耦合光在势谷之间的横向聚焦来实现.散射既能使控制光点的有效强度的阈值和孤子的辐射损耗增大,势垒增高,幅度下降较小,有利于孤子开关的形成;又能使波束展宽较宽,并存在开关被破坏的危险.由此可见,Compton散射下恰当控制入射激光强度是实现孤子开关的关键.

Spatial Soliton Switching in Multi-channel Planar Waveguide System under Compton Scattering

Using the quantum perturbation theory and model of the multi-photon nonlinear Compton scattering,the optically controlled switching for spatial soliton in multi-channel planar waveguide system under Compton scattering is studied.The result shows that in the nonlinear planar optical waveguide with a sinusoidal modulation of the refractive index in the transverse direction,the soliton can be cut between a channel and near channel,through the pinch soliton wave beam effect in the transverse direction of the cross phase modulation between the soliton in the channel,and control optical point formed by the incident optical and scattered optical,and the function of the soliton switching is attained.The control optical point can be attained by the transverse direction focusing of the coupling optical between a potential valley and near potential valley.The threshold of the effective intensity of the control optical point and the radiation loss of the soliton can be increased by the scattered optical,the potential wall high is increased,and the littler extent is reduced.These are all beneficial to the soliton form,the wide unfolded by the scattering of the soliton wave beam is bigger,and the danger destroyed by the scattering to the soliton switching is existing too.Therefore, the control appropriate incident laser intensity is the key for the attaining soliton switching.