A 4-element fiber laser hydrophone towed linear array

Gu, Hongen; Huang, Junbin; Yu, Huabing; Li, Rizhong; Tang, Bo; Wu, Jinglei

doi:10.1117/12.2072075

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…Such hydrophone was deployed at a 33 m deep seabed for a field test at the south coast of Australia and was tested using a calibrated acoustic source in the frequency range from 500 Hz to 3 kHz [ 104 ]. In 2014, H. C. Gu fabricated a linear dragging array containing four fiber laser hydrophones which use DFB-FL as sensing element [ 105 ]. The underwater acoustic detection experiment and towing test were conducted in the lake of Mogan Mountain, showing a responsivity of −135 dB in the frequency range from 20 Hz to 1000 Hz.…”

Section: Optical Fiber Sensors For Seismic Monitoringmentioning

confidence: 99%

Innovative Photonic Sensors for Safety and Security, Part III: Environment, Agriculture and Soil Monitoring

Breglio

Bernini

Berruti

et al. 2023

Sensors

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In order to complete this set of three companion papers, in this last, we focus our attention on environmental monitoring by taking advantage of photonic technologies. After reporting on some configurations useful for high precision agriculture, we explore the problems connected with soil water content measurement and landslide early warning. Then, we concentrate on a new generation of seismic sensors useful in both terrestrial and under water contests. Finally, we discuss a number of optical fiber sensors for use in radiation environments.

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Section: Optical Fiber Sensors For Seismic Monitoringmentioning

confidence: 99%

Innovative Photonic Sensors for Safety and Security, Part III: Environment, Agriculture and Soil Monitoring

Breglio

Bernini

Berruti

et al. 2023

Sensors

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“…The sensitivity of a single hydrophone was about -135 dB. In the range of 20 Hz to 1 kHz, the amplitude fluctuation was less than ± 1.5 dB [9]. This paper systematically introduces the research results of the Laser Research Institute of Shandong Institute of Science and Technology in the high sensitivity of the eight-element multiplexed array fiber laser acoustic pressure hydrophone system.…”

Section: Introductionmentioning

confidence: 98%

Development of high sensitivity eight-element multiplexed fiber laser acoustic pressure hydrophone array and interrogation system

Sun

Zhang

et al. 2017

Photonic Sens

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Fiber laser hydrophones have got widespread concerns due to the unique advantages and broad application prospects. In this paper, the research results of the eight-element multiplexed fiber laser acoustic pressure array and the interrogation system are introduced, containing low-noise distributed feedback fiber laser (DFB-FL) fabrication, sensitivity enhancement packaging, and interferometric signal demodulation. The frequency response range of the system is 10 Hz -10 kHz, the laser frequency acoustic pressure sensitivity reaches 115 dB re Hz/Pa, and the equivalent noise acoustic pressure is less than 1 2 60μPa Hz . The dynamic range of the system is greater than 120 dB.

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“…Other authors [ 7 ] developed a distributed fiber laser feedback hydrophone (DFB-FL) and deployed it on the seafloor for a field test on the south coast of Australia [ 8 ]. In 2014, a linear towed array with four fiber laser hydrophones using a DFB-FL was used as the sensing element [ 9 ] and was tested in Mogan Mountain lake. More recently, various configurations of interferometric FOH have been proposed [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

An Innovative Fiber-Optic Hydrophone for Seismology: Testing Detection Capacity for Very Low-Energy Earthquakes

Guardato

Riccio

Janneh

et al. 2023

Sensors

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An innovative fiber-optic hydrophone (FOH) was developed and investigated via an experiment at sea; it is capable of operating at a very low frequency of the seismic spectrum and detecting small magnitude earthquakes. The FOH exploits an optical fiber coil wrapped around a sensitive mandrel in a Michelson interferometric configuration. The FOH operated for about seven days at a water depth of 40 m, in the Campi Flegrei volcanic area (Southern Italy), and a few meters from a well-calibrated PZT hydrophone used as a reference. Thirty-three local earthquakes occurred during the simultaneous operation of the two hydrophones, allowing a straightforward comparison of the recordings. The local earthquakes occurred at an epicentral distance less than 2.5 km from the site of recording, and were estimated to be in the range of magnitude from −0.8 to 2.7. The analysis of the recorded earthquake waveforms in the frequency and time domains allowed retrieving the response function of the FOH in the frequency range from 5 to 70 Hz. The FOH responsivity in terms of acoustic pressure reached about 230 nm/Pa and was flat in the studied frequency range. Due to the high quality of the FOH recordings, this equipment is suitable for applications addressing submarine volcanic activity and the background seismicity of active faults in the ocean.

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A 4-element fiber laser hydrophone towed linear array

Cited by 4 publications

References 7 publications

Innovative Photonic Sensors for Safety and Security, Part III: Environment, Agriculture and Soil Monitoring

Innovative Photonic Sensors for Safety and Security, Part III: Environment, Agriculture and Soil Monitoring

Development of high sensitivity eight-element multiplexed fiber laser acoustic pressure hydrophone array and interrogation system

An Innovative Fiber-Optic Hydrophone for Seismology: Testing Detection Capacity for Very Low-Energy Earthquakes

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