Abstract

In this paper, the study on response of a broadband light source for an optical fiber sensor (OFS) based on surface plasmon resonance (SPR) technology is presented. The OFS is made of a multimode optical fiber which cladding was removed and coated with two layers of metal films. As a broadband light source is launched into the OFS at a suitable incident angle, we can obtain the intensity at the output of the optical fiber sensor. With the structure, the refractive index detection can be made by the SPR spectra that are obtained by an Optical Spectrum Analyzer (OSA). The OFS could be valuable for chemical, biological and biochemical sensing, etc. It has some advantages, such as, high resolution and stability, small size and real-time measurement.

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