Journal of Sensors / 2009 / Article / Fig 3

Review Article

Microstructured and Photonic Bandgap Fibers for Applications in the Resonant Bio- and Chemical Sensors

Figure 3

Refractive index sensors based on hollow core PBG Bragg fibers. (a) Schematic of a hollow core Bragg fiber filled with aqueous analyte of refractive index . (b) Radiation-dominated propagation loss of a core-guided mode for two Bragg fibers with core radii (solid curve) and (thin dashed curve). When analyte refractive index changes, so does the radiation loss of a fiber core mode (thick dashed curve). For the reference, in thin solid line we present absorption loss of distilled water in the visible. (c) Maximal amplitude sensitivity of the analyte filled Bragg fiber-based sensor for the two values of the fiber core radius. Note that amplitude sensitivity is almost independent of the fiber core radius.

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