Quantitative Information Acquisition of Ships Based on Existing Composite Submarine Cables and DAS

Yici Chen; Jinyi Wu; Yifan Liu; Boqi Chen; Feifei Song; Xuan Li; Haoyang Pi; Zhaoyong Wang; Liang Wang; Qing Ye; Haiwen Cai; Ronghui Qu

doi:10.3788/CJL250566

Chinese Journal of Lasers, Volume. 52, Issue 17, 1710003(2025)

Quantitative Information Acquisition of Ships Based on Existing Composite Submarine Cables and DAS

Yici Chen^1,2, Jinyi Wu^1,3, Yifan Liu^1,3, Boqi Chen^1,3, Feifei Song^1,3, Xuan Li¹, Haoyang Pi¹, Zhaoyong Wang^1,3,4、*, Liang Wang^2、**, Qing Ye^1,3,4、***, Haiwen Cai¹, and Ronghui Qu¹

Author Affiliations

¹Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

²School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, Hubei , China

³Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

⁴Shanghai Zhongke Shenguang Optoelecronic Industry Co., Ltd., Shanghai 201815, China

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Abstract Get PDF(in Chinese)

Figures & Tables(14)

Fig. 1. Principle of Φ-OTDR system

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Fig. 2. Schematic diagram of the relationship between ship and optical cable

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Fig. 3. Hydrodynamic pressure simulation curves below the ship central axis. (a) Spatial distribution; (b) temporal variation

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Fig. 4. Value distribution of $R_{t}$

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Fig. 5. Distribution of Doppler frequency shift on optical cable. (a) Observed frequency distribution at different time intervals when the heading angle is 0°; (b) observed frequency distribution at different heading angles at ship approaching cable

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Fig. 6. Flowchart of ship information acquisition method

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Fig. 7. Experimental setup

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Fig. 8. Ship acoustic signal. (a) Frequency spectrum; (b) space-frequency distribution

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Fig. 9. Hydrodynamic pressure curve below the ship central axis. (a) Ship A; (b) ship B

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Fig. 10. Space-frequency distribution and Doppler shift curve of ship A. (a) Close to the cable; (b) over the top; (c) away from the cable

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Fig. 11. Energy change diagram of ship A near the center frequency

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Table 1. Simulation parameters
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Table 1. Simulation parameters
Case No. LengthL /m WidthB /m Draughtdepth d /m Speed V /（m/s）
1 50 8 3 2
2 100 16 6 4
3 100 16 6 5

Table 2. Ship parameters
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Table 2. Ship parameters
Ship number LengthL /m Widthb /m Draught depth d /m SpeedV /（m/s）
A 103 16 5.5 4.06
B 53 9 3.4 2.78

Table 3. Ship parameter information obtained by DAS and AIS

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Table 3. Ship parameter information obtained by DAS and AIS

Ship parameter	DAS experimental value	AIS value	Absolute error	Relative error
Spectrum	5.98 Hz, 7.11 Hz, 8.60 Hz, 8.71 Hz, 21.29 Hz, 42.51 Hz	—	—	—
Speed	3.97 m/s	4.06 m/s	0.09 m/s	2.22%
Length	99 m	103 m	4 m	3.88%

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Yici Chen, Jinyi Wu, Yifan Liu, Boqi Chen, Feifei Song, Xuan Li, Haoyang Pi, Zhaoyong Wang, Liang Wang, Qing Ye, Haiwen Cai, Ronghui Qu. Quantitative Information Acquisition of Ships Based on Existing Composite Submarine Cables and DAS[J]. Chinese Journal of Lasers, 2025, 52(17): 1710003

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