Miniaturized high-integration optical fiber vector hydrophone

Abstract

The invention provides a miniaturized high-integration optical fiber vector hydrophone. The miniaturized high-integration optical fiber vector hydrophone comprises a narrow linewidth light source (1),a signal sounder (2), an acoustic optical modulator (3), an optical fiber circulator (4), an optical fiber vector hydrophone probe (5) and an acquisition / demodulation system (6), wherein the narrow-linewidth light source (1) is connected with the acoustic optical modulator (3) and the signal sounder (2) respectively; the acoustic optical modulator (3) is connected with the optical fiber circulator (4); the optical fiber vector hydrophone probe (5) is connected with the optical fiber circulator (4); and the acquisition / demodulation system (6) is connected with the optical fiber circulator (4).The three-dimensional optical fiber hydrophone is high in stability, adopts a differential pressure and co-oscillation combined form, and is suitable for an intermediate frequency working band between low frequency and high frequency.

Description

technical field [0001] The present invention relates to the technical field of optical fiber sensing for ocean observation, in particular to a miniaturized and highly integrated optical fiber vector hydrophone, in particular to a miniaturized optical fiber vector hydrophone that is highly integrated in a three-dimensional differential pressure type and a three-dimensional co-vibration type Fiber optic vector hydrophone in a hydrophone sphere. Background technique [0002] Optical fiber hydrophone is an underwater acoustic signal sensor based on optical fiber and optoelectronic technology. Interferometric fiber optic hydrophones change the refractive index or length of the fiber core through the action of acoustic waves in water to change the refractive index or length of the fiber core, which causes the optical path of the beam propagating in the fiber to change, directly resulting in a change in the optical phase. This phase change can be detected by using interferometry t...

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