Figure 6.

Optimization of metal film thickness t₁ structure of plasmonic optical fiber sensor under the same refractive index of T and liquid to be measured: (a) The variation of transmission loss with wavelength; (b) The FWHM of channel 1 varies with H under different thicknesses of t₁; (c) The variation of magnetic field intensity sensitivity with t₁; (d) The variation of resonant wavelength shift of channel 1 and channel 2 with magnetic field intensity and its linear fitting results; (e) The FWHM of channel 1 varies with the intensity of the magnetic field for t₁ = 40 nm.