Author Affiliations
Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, Guangdong 510632, Chinashow less
Fig. 1. SEM image of the cross section of PM-MOF
Fig. 2. Mode fielddistribution and effective refractive of fundamental modes before and after liquid filling in MOF air-hole. (a) Before liquid filling; (b) after liquid filling
Fig. 3. Schematic of all-fiber optofluidic sensing system and the PRF structure
Fig. 4. Curves of phase modal birefringence with wavelength of MOF before and after liquid filling and PRF twist period as a function of the resonant wavelength. (a) Phase modal birefringence of the MOF as a function of wavelength; (b) twist period of the PRF as a function of the resonant wavelength
Fig. 5. Transmission spectra of the PRF with Λ=17.8 mm, N=12, θeff=3.75° before and after liquid filling
Fig. 6. Output spectrum characteristics of PRF at different twist period lengths when N=12, θeff=3.75°. (a) Output spectra; (b) resonant wavelength of PRF as a function of the twist period lengths
Fig. 7. Output spectral characteristics of PRF at different numbers of twist period when θeff=3.75° and Λ=17.8 mm. (a) Output spectra; (b) coupling efficiency
Fig. 8. Output spectral characteristics of PRF at different numbers of twist period and twist angle when Λ=17.8 mm, 4Nθeff=π. (a) Output spectra; (b) coupling efficiency
Fig. 9. Transmission spectra characteristics of PRF for different microfluidic refractive index values. (a) (b) Modal birefringence dispersion of the MOF as a function of wavelength; (c) transmission spectra of PRF; (d) resonant wavelength of the PRF as a function of the microfluidic refractive index value
Fig. 10. Resizing of the cross section of PM-MOF
Fig. 11. Characteristics of microfluidic refractive index sensitivity as a function of MOF core size. (a) Phase modal birefringence of PM-MOF when liquid refractive index is 1.333 as a function of resizing coefficient α; (b) variation of phase modal birefringence of MOF with respect to microfluidic refractive index at the wavelength of 1550 nm as a function of α; (c) optofluidic refractive index sensitivity of the PRF as a function of α