光束在一种新型波导中的传输特性

Propagation Characteristics of Beams in a New Type of Waveguide

研究一种新型波导——Parity-time对称波导呈现不同复合势时孤子和高斯光波的传输特性。研究结果显示:孤子在PT对称光学晶格传输,随着复折射率实部系数逐渐增大,波浪频率增加。孤子在Scarff Ⅱ势PT对称波导中传输波浪大而稳定。高斯光波在PT对称光学晶格中呈两条波浪线式传输,而在Scarff Ⅱ势PT对称波导中先是分成两束光波,传输波导末端,向波导中心返回,再分成两束光波,不断重复传输。该研究结果为PT对称波导在光通信中的光控制进一步研究做出理论铺垫。

In this paper,a study was made of the propagation characteristics of solitons and Gauss waves in a new type of waveguide when the waveguide presents different composite potentials.The results show that the solitons are transmitted in the PT symmetric optical lattice.When the real coefficient is gradually increased,the frequency of wave increases.The solitons are transmitted in the PT symmetric waveguide of Scarff Ⅱ potential,with the waves being larger and more stable.In the PT symmetric optical lattice,the light waves are transmitted in two wavy lines.In the PT symmetric waveguide of Scarff Ⅱ potential,the light wave first splits into two light waves until it is transmitted to the outermost edge of the waveguide,then returns to the center of the waveguide and merges into two light waves,which are continuously repeated.The results can lay a theoretical foundation for further research on optical control of PT symmetric waveguide in optical communication.