Kai Li, Jingtao Xin, Fei Luo, Xiaoping Lou, Lianqing Zhu. Central Wavelength Interrogation Method of Ultra-Short FBG by Dual-Wavelength Laser[J]. Laser & Optoelectronics Progress, 2018, 55(3): 030602
- Laser & Optoelectronics Progress
- Vol. 55, Issue 3, 030602 (2018)
Fig. 1. Reflective of FBGs. (a) Different grating lengths; (b) different refractive index modulation depths
Fig. 2. Schematic of interrogation by single-wavelength laser
Fig. 3. Schematic of interrogation by dual-wavelength laser
Fig. 4. Schematic of interrogation experimental setup by dual-wavelength laser
Fig. 5. Reflection spectra of US-FBG. (a) Different kinds of fibers; (b) different lengths of grating region
Fig. 6. Analysis of linearization data on both sides of US-FBG reflection spectra
Fig. 7. (a) Relationship between P1 and the central wavelength of US-FBG; (b) relationship between P2 and the central wavelength of US-FBG
Fig. 8. Experimental results and theoretical values of US-FBG central wavelength
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