Nguyen, Hue ThiStepniewski, GrzegorzFilipkowski, AdamKasztelanic, RafalPysz, DariuszVan Le, HieuStepien, RyszardKlimczak, MariuszKrolikowski, WieslawBuczynski, Ryszard2025-06-102025-06-10http://www.scopus.com/inward/record.url?scp=85146719668&partnerID=8YFLogxKhttps://hdl.handle.net/1885/733757964We present an experimental study on generation and transmission of optical vortex in an all-fiber system consisting of an antiresonant fiber butt-coupled with a dedicated fiber-based vortex generator. The influence of external perturbations like fiber bend, axial stress on structural stability of the transmitted vortex in the antiresonant fiber is also reported.Notably, the OAM beam was generated using a miniaturized fiber-based generator instead of any bulks of freespace elements. This generator allows controlling topological charge values, beam sizes of the vortex. Moreover, it is possible to realize full integration of fiber-based vortex generator and AR fiber using the modern fusion splicer and silica-based nGRIN components. Therefore, the developed all-fiber system for OAM mode excitation and transmission in AR fibers offers high flexibility to satisfy various specific requirements of practical applications. Acknowledgments: Preludium-20 of National Science Center, grant no. 2021/41/N/ST7/01517. W.K. acknowledges support by Qatar National Research Fund, grant: NPRP12S-0205-190047. References [1] L. Allen et al., “Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes,” Phys. Rev. A,45, 8185, 1992. [2] Y. Shen et al., “Optical vortices 30 years on: OAM manipulation from topological charge to multiple singularities,” Light: Science and Applications, 8, 1–29, 2019. [3] H.T.Nguyenetal.,“All-fibernanostructuredgradientopticsvortexbeamconverter,”OptLasersEng,150,106841,2022. [4] K.Switkowskietal.,“Formationofopticalvorticeswithall-glassnanostructuredgradientindexmasks,”Opt.Express,25,31443, 2017. [5]F.Hudelistetal., “Designandfabricationofnanostructuredgradientindexmicrolenses,”Opt.Express,17,3255,2009. [6] A. M. Khegai et al., “Heterodyne photothermal spectroscopy of methane near 1651 nm inside hollow-core fiber using a bismuth-doped fiber amplifier,” Appl. Opt.60, C84-C91, 2021.enPublisher Copyright: © Optica Publishing Group 2022 © 2022 The Author(s)202285146719668