Optical Fiber Sensors Based on Nanoparticle-Embedded Coatings

Figure 1

Schematic of the most used optical configurations used for the development of absorbance-based sensors with NP-embedded coatings: (a) cladding-removed fiber; (b) U-shape or bent fiber; (c) tapered fiber. Evanescent field is also depicted as tails that penetrate and interact within the coating.

(a)

(b)

(c)