Type-II Bragg gratings with a 300 nm period fabricated using tightly focused femtosecond pulses and the phase mask technique
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1000°C-resistant Bragg gratings (i.e., Type-II Bragg gratings) with a 300 nm period are fabricated in non-photosensitized silica-based optical fibers using tightly focused ultraviolet/visible (400 nm) femtosecond pulses and a phase mask. Five millimeter-long ... ...
