论文部分内容阅读
从光纤光栅慢光产生的物理机理和非线性耦合模方程组,仿真分析了均匀布拉格光栅中光栅孤子传输时的减速特性;利用高速示波器搭建了测量高能量、窄脉冲通过布拉格光纤光栅后时延特性的实验系统,分别测量了由普通单模光纤和高非线性光纤制作的均匀光栅对光脉冲的时延特性。实验结果为:用5 cm长普通单模光纤制作的布拉格光栅可以使在其中传输的光脉冲产生426 ps的时延,而相同长度高非线性布拉格光纤光栅对光脉冲的时延量为1.639 ns。计算后可知,光脉冲在对应光栅中的传输速度分别约为1.17×108m/s和0.31×108m/s。结果说明光纤光栅能够实现光速减慢,而且高非线性光纤光栅对光脉冲的减速效果要好于普通单模光纤制作的光栅。
Based on the physical mechanism and nonlinear coupled-mode equations of slow-light generated by fiber grating, the deceleration characteristics of the grating soliton transmission in the uniform Bragg grating are simulated. The high-speed oscilloscope is used to measure the delay after the high-energy and narrow-pulse passing through the fiber Bragg grating Characteristics of the experimental system were measured by the ordinary single-mode fiber and high nonlinear fiber made uniform grating on the optical pulse delay characteristics. The experimental results show that the Bragg grating fabricated with 5 cm ordinary single-mode fiber can produce 426 ps delay in the light pulse transmitted therethrough, while the delay of the light pulse with the same length and high nonlinear fiber Bragg grating is 1.639 ns . After calculation, it can be seen that the transmission velocities of the optical pulses in the corresponding gratings are respectively about 1.17 × 108 m / s and 0.31 × 108 m / s. The results show that the FBG can slow down the speed of light, and the effect of deceleration of the light pulse by the high nonlinear FBG is better than that of the ordinary single mode fiber.