Investigation And Experiment Of Slow Soliton Based On Special Structure Of Optical Fiber Grating

With the development of science and technology, the requirements of speed in data transmission are also increasing. All-optical communication networks is presented to solve this problem, and optical switching technology as an important technology in the network have been extensively studied, in which optical buffer technology has become a research hotspot.Based on the nonlinear coupled mode equations (NLCMEs), the transmission characteristics of grating solitons in rectangle-apodized fiber Bragg gratings are numerically simulated and analyzed while using grating soliton as the incident pulse. In this paper, we introduce both concave and convex rectangular apodization in the middle of gratings to achieve slow light. The rectangular apodization can induce the step of the grating coupling coefficient to give rise to slow Bragg solitons in gratings. The effects of the soliton energy parameters, the width of rectangular apodization and the variation of coupling coefficient on the soliton transmission are given. The results show that, the speed of solitons can be slowed down, and the capture capability of solitons depends on the energy of input solitons, coupling coefficient, and the rectangular width.We designed and completed an experiment to measure the delay time when soliton pass a FBG using high-speed oscilloscope. It's found that the delay when soliton passed general FBG is longer than the delay when it passed a FBG with high nonlinearity. And then we designed a solution of optic buffer based on this.