Fig. 1. Cross section of D-shaped hole double-cladding fiber SPR temperature sensor and the proposed setup for loss spectrum interrogation.

Fig. 2. Electric field distribution (a) of y polarization and (b) of x polarization.

Fig. 3. Real part of effective refractive index of fiber core mode and SPP mode and the loss spectrum of fiber SPR sensor.

Fig. 4. Influence of rd on the loss spectrum. (a) rd=5  μm, (b) rd=5.5  μm, (c) rd=6  μm, and (d) the fitted results of resonant wavelength of y polarization with different temperatures, where the blue, red, and black markers are the simulation results.

Fig. 5. Influence of hAu on the loss spectrum. (a) hAu=47  nm, (b) hAu=57  nm, (c) hAu=67  nm, and (d) the fitted results of resonant wavelength of y polarization with different temperatures, where the blue, red, and black markers are the simulation results.

Fig. 6. (a) Loss spectra with different temperatures of y polarization and (b) fitted result of resonant wavelength with different temperatures, where the blue squares are the simulation results and the red line represents the fitted line.