Abstract
Two promising post-treatment techniques, i.e. applying tensile strain and rising temperature, are demonstrated to enhance the mode-coupling efficiency of the CO2-laser-induced long period fiber gratings (LPFGs) with periodic grooves. Such two post-treatment techniques can be used to enhance the resonant attenuation of the grating to achieve a LPFG-based filter with an extremely large attenuation and to tailor the transmission spectrum of the CO2-laser-induced LPFG after grating fabrication.
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Xu, X., Tang, J., Zhao, J. et al. Post-treatment techniques for enhancing mode-coupling in long period fiber gratings induced by CO2 laser. Photonic Sens 5, 339–344 (2015). https://doi.org/10.1007/s13320-015-0277-5
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DOI: https://doi.org/10.1007/s13320-015-0277-5