Research on pulse transmission characteristics based on combined dispersion- decreasing fiber loop mirror

Abstract

This paper investigates a combined dispersion-decreasing fiber loop mirror consisting of a fourth order super-Gaussian dispersion-decreasing fiber and a Gaussian dispersion-decreasing fiber. The length ratio of the two optical fibers in the loop mirror is analyzed and optimized to achieve a high-quality ultra-short output pulse. The results show that the optimal output pulse with no pedestal and a high compression ratio of F = 49.6 can be obtain at the fiber length L = 4.3km. Compared with the traditional dispersion-decreasing fiber loop mirror, the compression ratio is increased by 18.5 times, achieving ultra-short pulse output at the picosecond level.