Correction: Hu et al. Direct Bragg Grating Inscription in Single Mode Step-Index TOPAS/ZEONEX Polymer Optical Fiber Using 520 nm Femtosecond Pulses. Polymers 2022, 14 , 1350.

FBG Inscription Using 520 nm Femtosecond Pulses, Paragraph 1 i b ": "In this work, 2-mm-long FBGs were fabricated in two pieces of POFs using the femtosecond laser PbP inscription method. FBG Inscription Using 520 nm Femtosecond Pulses, Paragraph 3 i b ": "For FBGs 2-6, the insertion losses induced by laser pulses are depicted in Figure 3. A correction has been made to " B I Abstract i b ": " B Abstract: b We experimentally report fiber Bragg gratings (FBGs) in a single mode step-index polymer optical fiber (POF) with a core made of TOPAS and cladding made of ZEONEX using 520 nm femtosecond pulses and a point-by-point (PbP) inscription method. [Extracted from the article]