Jianguan Tang, Shuqi Huang, Huiyong Guo, Dian Fan, Minghong Yang. On-Line Writing and Performance High-Temperature Resistant Fiber Bragg Grating Array[J]. Laser & Optoelectronics Progress, 2023, 60(7): 0706002
- Laser & Optoelectronics Progress
- Vol. 60, Issue 7, 0706002 (2023)
Fig. 1. Schematic of the on-line writing PI-FBGA system
Fig. 2. Central wavelength and reflectivity distribution of 200 consecutive gratings in an array
Fig. 3. Reflection spectra of 200 consecutive gratings in an array
Fig. 4. Transmission loss spectrum of PI-FBGA
Fig. 5. Weibull distribution of polyacrylate and polyimide fiber
Fig. 6. Thermal degradation of PI-FBGs at different temperatures
Fig. 7. Variation of normalized reflectivity and central wavelength change with time under long-term aging at 250 ℃
Fig. 8. Variation of normalized reflectivity and central wavelength change with temperature in the three thermal cycles at 350 ℃
Fig. 9. Microscope images of PI-FBGs. (a) Initial FBG; (b) aging at 200 ℃ for 45 days; (c) aging at 250 ℃ for 36 days; (d) aging at 300 ℃ for 16 days; (e) aging at 350 ℃ for 4 days; (f) aging at 400 ℃ for 2 days
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Table 1. Median fracture stress σf(0.5) and Weibull slope m at different elongation speeds of polyacrylate and polyimide fiber
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Table 2. Constant term fitted values at different aging temperatures
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