We proposed a hybrid tilted fiber gratings(polarizing grating and tilted fiber Bragg grating)-based surface plasmon resonance(SPR)sensor.The hybrid tilted fiber grating,consisting of a polarizing grating and tilted fi...We proposed a hybrid tilted fiber gratings(polarizing grating and tilted fiber Bragg grating)-based surface plasmon resonance(SPR)sensor.The hybrid tilted fiber grating,consisting of a polarizing grating and tilted fiber Bragg grating(TFBG),is fabricated in a single mode fiber in series by using a UV-inscription technique,in which the TFBG could generate a dense cladding mode resonance to excite SPR and the polarizing grating could filter out the S-polarization cladding mode of the TFBG.Such proposed hybrid tilted fiber gratings could greatly simplify the interrogation system of the TFBG-based SPR sensor.The experiment results showed that the hybrid tilted fiber gratings-based SPR sensor has the refractive index sensitivity of 522.8 nm/RIU.Finally,by using the proposed sensor,we have achieved the hemoglobin concentration detection within a sensing range from 0.1 mg/mL to 1.0 mg/mL and the sensitivity of 8.144 nm/(mg/mL).展开更多
基金the National Key R&D Program of China(No.2018YFB2100902)the Science Fund for Creative Research Groups of the Natural Science Foundation of Hubei(Nos.2019AAA053 and 2018CFA004)the National Secretariat for Science,Technology and Innovation(SENACYT)of the Republic of Panamna.
文摘We proposed a hybrid tilted fiber gratings(polarizing grating and tilted fiber Bragg grating)-based surface plasmon resonance(SPR)sensor.The hybrid tilted fiber grating,consisting of a polarizing grating and tilted fiber Bragg grating(TFBG),is fabricated in a single mode fiber in series by using a UV-inscription technique,in which the TFBG could generate a dense cladding mode resonance to excite SPR and the polarizing grating could filter out the S-polarization cladding mode of the TFBG.Such proposed hybrid tilted fiber gratings could greatly simplify the interrogation system of the TFBG-based SPR sensor.The experiment results showed that the hybrid tilted fiber gratings-based SPR sensor has the refractive index sensitivity of 522.8 nm/RIU.Finally,by using the proposed sensor,we have achieved the hemoglobin concentration detection within a sensing range from 0.1 mg/mL to 1.0 mg/mL and the sensitivity of 8.144 nm/(mg/mL).
