Abstract
An intensity-modulated refractive index (RI) sensor based on a bending single-mode fiber (BSF) cascaded with fiber Bragg gratings (FBGs) is designed and experimentally investigated. The BSF structure can be easily fabricated by bending a section of single-mode fiber without coating, which is immersed in the RI matching solution. The different values of RI can be measured by monitoring the variation of the intensity difference of transmission dips of two FBGs. The experimental results show that the RI sensitivity of the proposed sensor is 413.23 dB/RIU in the sensing range from 1.333 to 1.371. In addition, the designed sensing system also shows a certain resistance to temperature cross-sensitivity and the fluctuation of light source, which can make a significant directive role in the field of food safety, biochemistry and environmental science.
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription