Dispersion tailoring of femtosecond laser written chirped fiber Bragg gratings by selective femtosecond laser post-processing

Imogore, T.O.T.O.ImogoreKrämer, R.G.R.G.KrämerGoebel, T.A.T.A.GoebelMatzdorf, C.C.MatzdorfRichter, D.D.RichterNolte, S.S.Nolte2022-03-062022-03-062020https://publica.fraunhofer.de/handle/publica/26964510.1364/OL.4116792-s2.0-85097035479We present the tuning of the dispersion properties of a femtosecond (fs) laser inscribed chirped fiber Bragg grating (CFBG), realized by selectively modifying the refractive index of the already inscribed CFBG by fs laser post-processing. This Letter demonstrates for the first time, to the best of our knowledge, a flexible approach for tailoring higher-order dispersion terms of a fs inscribed CFBG via fs post-processing of selected grating regions, thus paving the way, e.g., for applications in dispersion management of ultrashort pulse fiber lasers.en620535Dispersion tailoring of femtosecond laser written chirped fiber Bragg gratings by selective femtosecond laser post-processingjournal article