resumo
In this letter, we report a tilted fiber Bragg grating (TFBG) with a laser-induced graphene coating. The device displays a cladding mode pattern with a bandwidth of 44 nm. Each spectral dip and peak senses the refractive index change, with sensitivities up to 9.62 dB/refractive index units (RIUs) and 4.00 dB/RIU, respectively. The interrogation of the whole spectral feature envelope can be performed either in the wavelength or in the amplitude domain, with sensitivities of 11.21 nm/RIU and 7.15 dB/RIU, respectively. The graphene-coated TFBG provides improved sensitivity over a standard TFBG with a simple fabrication process and does not require additional components (such as polarizers or intensity-modulating devices) or fiber manipulations (such as etching, tapering, or capillaries). The achieved precision of up to 4.17 x 10(-4) RIU is compatible with refractometry and biosensing applications.
palavras-chave
SENSORS
categoria
Engineering; Instruments & Instrumentation; Physics
autores
Nurlankyzy, M; Pereira, L; Zhakypbekova, A; Bekmurzayeva, A; Ashikbayeva, Z; Ioannou, A; Kalli, K; Costa, FM; Santos, N; Marques, C; Tosi, D
nossos autores
Carlos Marques
Professor Auxiliar
João Lucas Alves Pereira
Estudante de doutoramentoProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
This work was supported in part by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan under Grant AP22783767, in part by Nazarbayev University under Grant 20122022FD4134 (Project M2O-DISK), in part by the CICECO-Aveiro Institute of Materials under Grant UIDB/50011/2020, Grant UIDP/50011/2020 and Grant LA/P/0006/2020 funded by national funds through the FCT/MCTES (PIDDAC), in part by i3N project under Grant UIDB/50025/2020, Grant UIDP/50025/2020, and Grant LA/P/0037/2020 funded by national funds through the FCT and MEC of Portugal, and in part by the European Union through the REFRESH project under Grant CZ.10.03.01/00/22_003/0000048 and Grant SP2025/039.