The design of the figure of merit of linearly chirped fiber gratings for dispersion compensation

We systematically summed and deduced the figure of merit of the compensator using linearly chirped fiber gratings, and numerically calculated the reflectivity and dispersion of the linearly chirped fiber gratings to obtain the figure of merit. On the other hand, we also discussed the figure of merit under the circumstances of three kinds of coupling coefficient and compared them. Finally, we presented one kind of perfect design of the compensator using the Gauss coupling function, and simply discussed the method to realize the Gauss coupling function in the fabrication of linearly chirped fiber gratings.