首页|Femtosecond laser direct written fiber Bragg gratings with narrow bandwidth and high sideband suppression
Femtosecond laser direct written fiber Bragg gratings with narrow bandwidth and high sideband suppression
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维普
Aiming for suppressing side-mode and spectrum broadening,a slit beam-shaping method and super-Gaussian apodization processing for femtosecond laser point-by-point[PbP]inscription technology of fiber Bragg gratings[FBGs]are reported here.High-quality FBGs,featuring narrow bandwidth of less than 0.3 nm,high reflectivity above 85％,low insertion loss[0.21 dB],and low cladding loss[0.82 dB],were obtained successfully.By a semi-automatic PbP inscription process,an array consisting of six FBGs,exhibiting almost no side-mode peaks with high suppression ability and narrow bandwidth,was fabricated along three independently developed single-mode fibers with an interval of 20 mm.
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维普
