Chirp-free tunable PMD compensation using Hi-Bi nonlinearly-chirped FBGs in a dual-pass configuration

摘要

In conclusion, a new PMD compensation method using an HN-FBG was proposed and demonstrated. This method provides a large amount of PMD compensation ability (250-600ps). Furthermore, the induced chirp of the HN-FBG is significantly reduced. As a consequence, the 45km SMF transmission power penalty for the single and dual path method is improved from 4dB to 0.5dB. So the dual-path method is a promising in-line PMD compensation technique which also has the advantage of being widely tunable, fiber compatible and compact.