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Plane-by-plane fabrication of fiber Bragg gratings in optical fibers using short-pulse femtosecond IR laser is proposed and demonstrated. By incorporating a cylindrical lens in the fabrication setup, a plane of index modification can be directly inscribed in fiber core by a single laser pulse through the proposed method. This plane-by-plane method simplifies the grating inscription process and allows...
We show that the polarization of surface-plasmon-resonance enhanced optical field can be manipulated to be linear by using a polarization-gating scheme, which benefits the ultrafast electron acceleration and efficient XUV frequency comb generation.
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