Fig. 1. Schematic diagram of the FBG-HCF temperature-strain dual-parameter sensor

Fig. 2. Experimental setup of the FBG-HCF temperature-strain dual-parameter sensing system

Fig. 3. Transmission spectrum of the FBG-HCF temperature-strain dual-parameter sensor

Fig. 4. Reflection spectrum of the FBG-HCF temperature-strain dual-parameter sensor

Fig. 5. Spectrum of the FBG-HCF temperatrue-strain dual-parameter sensor under different strains

Fig. 6. Relationship between the wavelength and the strain under different temperatures

Fig. 7. Correspondence relationship between temperature-wavelength without strain.