Thulium doped all-fiber laser based on a double-cladding Bragg grating via femtosecond laser plane-by-plane writing technology
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The fiber Bragg grating (FBG) is fabricated by the femtosecond laser writing technique with a plane-by-plane (Pl-by-Pl) method in the double-cladding fiber (DCF). The refractive index modified (RIM) region formed by this method is 12 μm × 8 μm in size. Due ... ...
