Formation of double-hump solitons and their applications in optical communication systems

Optical communication system with optical solitons has the characteristics of low relay cost, low bit error rate and long relay distance. The modern optical communication system is developing towards large capacity, long distance and high speed. The width of optical pulse has been increased to femtosecond. With the increase of signal frequency, the effects of dispersion and nonlinear involved in it become more and more complex. Therefore, using femtosecond soliton communication to overcome these problems has urgent practical significance. In this paper, starting from the coupled nonlinear Schrödinger equation describing soliton transmission, we use the bilinear method to study the transmission characteristics and interaction of double-hump solitons under the interaction of dispersion and nonlinear effects, solve the problem of mutual interference between adjacent optical solitons, and realize the non-interaction transmission between adjacent solitons. This conclusion lays a theoretical foundation for the optical soliton propagation without distortion and interference in optical communication systems.