Inscription of Helical Bragg Gratings in Multimode Silica-based Fiber

V.V. Likhov,S.A. Vasiliev, G.K. Alagashev,A.G. Okhrimchuk

Optica Advanced Photonics Congress 2022（2022）

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摘要

Helical Bragg gratings have been inscribed in multimode silica-based fiber by a lenticular-shaped beam waist of the femtosecond laser. Modes with nonzero orbital angular momentum have been observed in reflection spectrum.

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关键词

helical bragg gratings,fiber,silica-based

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