Chinese Optics, Volume. 16, Issue 2, 366(2023)
Theoretical and experimental research on flexible fiber grating hydrophone array
Fig. 4. Relation curve of sound pressure sensitivity to length of elastic cylinder winded with fiber
Fig. 5. Relation curves of sound pressure sensitivity to Young’s modulus of elastic cylinder at different Poisson ratios
Fig. 6. Relation curves of sound pressure sensitivity to inner diameter of elastic cylinder at different thicknesses of elastic cylinder
Fig. 7. First-order modal cloud image of 8 mm×12 mm flexible fiber grating hydrophone
Fig. 8. Frequency response curve of 8 mm×12 mm flexible FBG hydrophone
Fig. 9. 2-element flexible fiber grating hydrophone array and its reflected signal waveform
Fig. 10. Data waveforms of flexible fiber grating hydrophone array
Fig. 12. Frequency response curve of 8 mm×12 mm flexible fiber grating hydrophone
Fig. 13. Frequency response curves of flexible fiber grating hydrophone
Table 1. Basic material parameters of hydrophone
View tableView in ArticleTable 1. Basic material parameters of hydrophone
材料名称 E/ GPa μ ρ/(kg·m−3) PE管（高压聚乙烯） 1.07 0.4101 950 弯曲不敏感光纤 19 0.34 1400
Table 2. Parameters and sensitivities of flexible fiber grating hydrophones
View tableView in ArticleTable 2. Parameters and sensitivities of flexible fiber grating hydrophones
规格 内半径a/mm 外半径b/mm 薄壁厚度D/mm 弹性体长度C/mm 声压灵敏度/dB（re 1rad/μPa） 8 mm×12 mm 4 6 2 66.31 −133.99 8 mm×10 mm 4 5 1 79.58 −128.45 12 mm×16 mm 6 8 2 49.74 −130.80
Table 3. Simulation results of sound pressure sensitivity of flexible fiber grating hydrophones with different specifications
View tableView in ArticleTable 3. Simulation results of sound pressure sensitivity of flexible fiber grating hydrophones with different specifications
光纤光栅水听器 平均声压灵敏度/ dB（re 1 rad/μPa） 8 mm×12 mm −138.63 8 mm×10 mm −132.90 12 mm×16 mm −135.30
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Miao ZHU, Hong-can GU, Wen-zhang SONG. Theoretical and experimental research on flexible fiber grating hydrophone array[J]. Chinese Optics, 2023, 16(2): 366
Category: Original Article
Received: Apr. 26, 2022
Accepted: Jul. 7, 2022
Published Online: Apr. 4, 2023
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