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14 April 2020 Phase-shifted Bragg grating inscription in photonic crystal fibers by UV phase mask beam stop technique
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Abstract
There are several techniques available for fabrication of phase-shifted gratings in single mode fibers. Yet, very few studies have examined inscription of such gratings in photonic crystal fibers (PCFs). In this paper, we report what we believe to be the first demonstration of the phase-shifted grating inscription in PCFs using a phase mask and a beam stop. The grating inscription is demonstrated for three hexagonal lattice PCFs with different air-filling fractions. The transmission spectra of the fabricated gratings reveal phase shift resonance peaks with a -3 dB bandwidth between 40 and 80 pm which is up to 4 times narrower than of the resonances of uniform Bragg gratings inscribed in the same fibers.
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© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Olga Rusyakina, Maria Konstantaki, Stavros Pissadakis, Pawel Mergo, Mariusz Makara, Tigran Baghdasaryan, Hugo Thienpont, Francis Berghmans, and Thomas Geernaert "Phase-shifted Bragg grating inscription in photonic crystal fibers by UV phase mask beam stop technique", Proc. SPIE 11355, Micro-Structured and Specialty Optical Fibres VI, 1135511 (14 April 2020); https://doi.org/10.1117/12.2556069
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