Wenzhang Song, Bo Tang, Junbin Huang, Hongcan Gu, Xuan Zhou, Yandong Pang, Yunyun Wang, Honglin Zhao. Low Frequency Dynamic Response of Diaphragm-Encapsulated Fiber Laser Hydrophone[J]. Chinese Journal of Lasers, 2022, 49(7): 0706005
- Chinese Journal of Lasers
- Vol. 49, Issue 7, 0706005 (2022)
Fig. 1. Design structure and transverse vibration diagram of fiber laser hydrophone
Fig. 2. Changes of the first three order natural frequencies of simply supported beam model with prestress
Fig. 3. First three order modes of simply supported beam model
Fig. 4. Changes of the first three order natural frequencies of clamped beam model with prestress
Fig. 5. First three order modes of clamped beam model
Fig. 6. Natural frequency and mode of diaphragm encapsulated fiber laser under 200 pm prestress. (a) First-order natural frequency and mode; (b) second-order natural frequency and mode; (c) three-order natural frequency and mode
Fig. 7. First-order natural frequency of fiber laser hydrophone under fluid-structure coupling
Fig. 8. Average radial strain of fiber laser under radial sound pressure and sensitivity of fiber laser hydrophone under total strain. (a) Average radial strain; (b) sensitivity of hydrophone
Fig. 9. Physical picture of fiber laser hydrophones after batch packaging
Fig. 10. Calibration of fiber laser hydrophone by vibrating liquid column system
Fig. 11. Sensitivity curves of fiber laser hydrophone under different prestresses
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Table 1. Natural frequency of fiber laser obtained by finite element simulation (without fluid-structure coupling)
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Table 2. Natural frequency of fiber laser obtained by finite element simulation (with fluid-structure coupling)
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Table 3. Initial wavelength and prestress of fiber laser hydrophone
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Table 4. Prestress of fiber laser hydrophone and resonance frequency corresponding to sensitivity curve
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