Calibration of Phaseshifted Sensitivity of Optical Fiber Hydrophone in the Frequency Range 20 Hz to 10 kHz

陈毅,; 张俊,; 张敏,; 王利威,

doi:10.3788/gzxb20114011.1686

Cited by 3 publications

(1 citation statement)

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“…In this paper, the phase generated carrier (PGC) demodulation technique is used to measure the change in optical phase shift after the fiber laser hydrophone is modulated by the acoustic pressure signal. The PGC technology has the characteristics of low noise, ease to implement multiplexing, and large dynamic demodulation range [14]. We developed two methods of PGC demodulation, differential cross multiplication (DCM), and arc tangent algorithm (Arctan).…”

Section: Design Of the Signal Interference Demodulation Systemmentioning

confidence: 99%

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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Section: Design Of the Signal Interference Demodulation Systemmentioning

confidence: 99%

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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Phase-shifted Sensitivity Calibration of Fiber Optic Vector Hydrophone Based on Heterodyne Method

Zhang

2021

2021 OES China Ocean Acoustics (COA)

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Method for obtaining phase amplitude based on carrier modulation

Zhu,

Zhang,

Wang

et al. 2024

Opt. Eng.

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A Bessel function method incorporating carrier modulation is introduced, which accurately determines the phase shift amplitude of vibration signals by analyzing the amplitude relationship between the carrier's main frequency and its harmonics. Experiments with a programmable signal generator and interferometer probe confirmed its feasibility and superiority over traditional Bessel function methods in weak signal calculations. In the experiment, this method can precisely calculate phase shifts down to 3.9 mrad and achieve a minimum detectable phase shift of 22 μrad, making it suitable for signal calibration in weak signal scenarios and analysis of phase carrier modulation signals.

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Calibration of Phaseshifted Sensitivity of Optical Fiber Hydrophone in the Frequency Range 20 Hz to 10 kHz

Cited by 3 publications

References 0 publications

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

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

Phase-shifted Sensitivity Calibration of Fiber Optic Vector Hydrophone Based on Heterodyne Method

Method for obtaining phase amplitude based on carrier modulation

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