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A laser-reduction technique is investigated to fabricate a novel long period fiber grating (LPFG), whose period is a section of graphene oxide (GO) and reduced graphene oxide (rGO) films on a side polished fiber. Raman spectra, X-ray diffraction, and Fourier transform infrared spectra show that a CW 405 nm laser with low power of only 84 mW is sufficient to fabricate this LPFG by laser-reducing the...
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