Fig. (2): The RI sensor system.
Result and discussion
The experimental setup is displayed in Fig. 2. Firstly, the response of
the fundamental SCS fiber configuration with 125 μm diameter of CLF
(i.e. without etching) towards the in air determined which revealed a
reasonably good extinction ratio, as shown in Fig. 3(A-C). Then, RI
sensitivity of the assembled SCS configuration was investigated by
immersing the sensor to various concentrations of NaCl solution
corresponding to different RIs in range of 1.333-1.382 to investigate
the surrounding RI response of SCS, while the temperature was preserved
at the room temperature (25◦C).