Fig 7. The wavelength shift versus the surrounding RI for fixed diameter.
Figure 8 (A-C) displays the spectral shifts of the proposed RI fiber sensor with CLF diameter of 50 μm and varies lengths against various RI values. These results confirm that the RI sensitivity is improved by decreasing the diameter of the CLF. The calculated sensitivities were arranged in table 7, 8 and 9 for length of 20, 25 and 30 mm respectively.