Lina Ma, Fan Shang, Yue Qi, Yujie Bian, Shuidong Xiong. Low-Noise and Low-Crosstalk In-Line Interferometric Fiber Bragg Grating Hydrophone Array with Only FBGs at Wet End[J]. Acta Optica Sinica, 2023, 43(5): 0506004
- Acta Optica Sinica
- Vol. 43, Issue 5, 0506004 (2023)
Fig. 1. Schematic diagram of base structure of interferometric FBG hydrophone
Fig. 2. Minimum common-mode structure of interferometric FBG hydrophone
Fig. 3. Diagram of interferometric FBG hydrophone multiplexed structure
Fig. 4. Schematic diagram of modulation and demodulation structures of interferometric fiber Bragg grating hydrophone
Fig. 5. FBG hydrophone primitive physical images. (a) Primitive encapsulation structure before formation; (b) primitive structure after formation
Fig. 6. Measured results of acoustic pressure sensitivity of 8-1 fiber Bragg grating hydrophone
Fig. 7. Test results of background phase noise of 1-1-1-8 fiber Bragg grating hydrophones
Fig. 8. Response signal demodulation results. (a) 8-1; (b) 7-8
Fig. 9. SDM crosstalk of 7th SDM channel
Fig. 10. WDM crosstalk of 1st SDM channel
Fig. 11. TDM crosstalk of 1st SDM channel. (a) WDM1; (b) WDM2
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