On the other hand , a new technology using tunable laser as light source of delay system is proposed , which uses the characteristics of optical fiber material dispersion which means that the refraction index of optical fiber changes along with the difference of transmitting wavelength 另一方面,提出一种通过采用可调谐激光器作为系统光源的技术,利用光纤的材料色散特性即光纤的折射率随传输波长变化而改变的特点,来改变延时光纤中信号存储的时间,从而达到提高光纤延迟线延时精度的目的。
Abstract : using the ray - tracing method , we demonstrate that a grating - telescope stretcher is the conjugation of a grating pair compressor . we present an analytical formula for calculating the phase dispersions of the grating - telescope stretcher . the computer simulation with the formula demonstrates that there exists an optimal material dispersion for an amplification system , with which we can achieve the largest dispersion - free bandwidth 文摘:用光线追迹法论证了光栅-球面镜系统与普通的光栅对系统是一对相位共轭元件,并提出了光栅-球面镜系统色散的解析计算公式,以及对一个典型的放大系统做了模拟.模拟结果表明,对于一个放大系统,存在一个最佳的材料色散,用它可以获得最大的无色散带宽