Xu, ZhulongZhulongXuWang, YuhanYuhanWangKUO-CHIH CHUANG2025-09-242025-09-242021https://www.scopus.com/inward/record.uri?eid=2-s2.0-85115797254&doi=10.1364%2FOL.435388&partnerID=40&md5=937cae45b8dddda432b46dccef614072https://scholars.lib.ntu.edu.tw/handle/123456789/732382We present a spectrum-tunable fiber Bragg grating (FBG) based on a unique compress-twist deformation mode of non-rigid origami. By applying axial displacement on the FBG-bonded Kresling-ori, a non-uniform strain field emerges. The mechanics-induced non-uniform strain can shift the wavelength of an apodized unchirped FBG and/or transform an apodized unchirped FBG to a chirped one. For the spectrum-shaping mode, the bandwidth of the FBG was tuned from 0.32 nm up to 2.9 nm, measured at the −6 dB level. For the wavelength-shift mode, a maximum wavelength shift of 0.6 nm can be achieved.Axial DisplacementsDeformation ModesNon-rigidNon-uniform StrainSpectra'sSpectral ShapingStrain FieldsTunable Fiber Bragg GratingsTwist DeformationsWavelength ShiftFiber Bragg Gratingsjournal article10.1364/OL.4353882-s2.0-85115797254