Hydrogen loading for fiber grating writing with a femtosecond laser and a phase mask
作者： Christopher W. Smelser , Stephen J. Mihailov , Dan Grobnic
DOI: 10.1364/OL.29.002127
关键词: Long-period fiber grating 、 Optics 、 Plastic optical fiber 、 Dispersion-shifted fiber 、 Materials science 、 PHOSFOS 、 Polarization-maintaining optical fiber 、 Graded-index fiber 、 Fiber Bragg grating 、 Photonic-crystal fiber
摘要: The threshold for the fabrication of fiber Bragg gratings with ultrafast 800-nm radiation and a phase mask was studied in SMF-28 all-silica core by use 125-fs pulses. High-pressure molecular hydrogen loading (H2 loading) observed to significantly lower grating writing standard Ge-doped telecommunication fiber. No reduction index change appeared be confined region Gratings H2-loaded had thermal annealing behavior similar UV-induced gratings. Unlike gratings, no absorption associated Ge–OH defect formation observed.
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