Moiré phase-shifted fiber Bragg gratings in polymer optical fibers

[EN] We demonstrate a simple way to fabricate phase-shifted fiber Bragg grating in polymer optical fibers as a narrowband transmission filter for a variety of applications at telecom wavelengths. The filters have been fabricated by overlapping two uniform fiber Bragg gratings with slightly different periods to create a Moire grating with only two pulses (one pulse is 15 ns) of UV power. Experimental characterization of the filter is provided under different conditions where the strain and temperature sensitivities were measured.The research leading to these results has received funding from the Fundacao para a Ciencia e Tecnologia (FCT - Portugal)/MEC through national funds and when applicable co-funded by FEDER - PT2020 partnership agreement under the project UID/EEA/50008/2013. C. A. F. Marques also acknowledges the financial support from FCT through the fellowship SFRH/BPD/109458/2015.Min, R.; Marques, C.; Bang, O.; Ortega Tamarit, B. (2018). Moiré phase-shifted fiber Bragg gratings in polymer optical fibers. Optical Fiber Technology. 41:78-81. https://doi.org/10.1016/j.yofte.2018.01.00378814