In this work, we reported 2-mm-long fiber Bragg gratings (FBGs) in benzyl dimethyl ketal (BDK)-doped poly(methyl methacrylate) (PMMA) optical fibers by means of a 520 nm femtosecond laser and point-by-point FBG inscription technique. The highest reflectivity of ~99% is obtained with a pulse energy of 11.2 nJ, showing a large refractive index modulation amplitude of 7.2×10-4 .
Bragg grating inscription in BDK-doped PMMA optical fiber using femtosecond laser point-by-point technique
European Workshop on Optical Fibre Sensors (EWOFS 2023) ; 2023 ; Mons, Belgium
Proc. SPIE ; 12643
2023-05-23
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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