Jingjing Liao, Lianqing Zhu, Yanming Song, Jingtao Xin, Zheng Lv. Fiber Bragg grating temperature insensitive filter based on bimetal structure[J]. Infrared and Laser Engineering, 2023, 52(3): 20220505
- Infrared and Laser Engineering
- Vol. 52, Issue 3, 20220505 (2023)
Fig. 1. Schematic diagram of bimetal structure
Fig. 2. Temperature sensitivity coefficient versus L 1/L 2
Fig. 3. Spectrum of ultra-short fiber grating
Fig. 4. (a) Schematic diagram and (b) physical drawing of temperature insensitive filter
Fig. 5. Experimental setup
Fig. 6. Fitting curve of the center wavelength of the tested fiber grating filter with temperature
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Table 1. Thermal expansion coefficient of common materials
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Table 2. Variation range of L 1/L 2 with different combinations of metal materials
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Table 3. Value range of quantitative corresponding variables
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Table 4. Relationship between L 1/L 2 and sensitivity coefficient
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Table 5. Filter size parameters
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Table 6. Temperature sensitivity coefficient corresponding to different L 1/L 2
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