Fig 5. The wavelength shift versus the surrounding RI for fixed diameter.
For the etched CLF with a diameter of 100 µm and a tuned length of 20, 25 and 30 mm, the calculated sensitivities listed in table 4, 5 and 6 for varies refractive indices. From these results, it can be notice that the sensing length of 25 mm has the highest sensitivity.
Table 4: The sensitivities of RI sensor with CLF diameter of 100 µm and length of 20 mm.