Abstract
Fiber-optic hydrophone (FOH) is a significant type of acoustic sensor, which can be used in both military and civilian fields such as underwater target detection, oil and natural gas prospecting, and earthquake inspection. The recent progress of FOH is introduced from five aspects, including large-scale FOH array, very-low-frequency detection, fiber-optic vector hydrophone (FOVH), towed linear array, and deep-sea and long-haul transmission. The above five aspects indicate the future development trends in the FOH research field, and they also provide a guideline for the practical applications of FOH as well as its array.
Highlights
IntroductionFiber-optic hydrophone (FOH) is a new generation of underwater acoustic sensor, which uses fiber as the medium of signal transmission and sensing
Fiber-optic hydrophone (FOH) is a new generation of underwater acoustic sensor, which uses fiber as the medium of signal transmission and sensing. It has a variety of advantages such as high sensitivity, large dynamic range, small size, light weight, immunity to electromagnetic interference, and ease to large-scale arrays, so it has attracted wide attention since the first paper about FOH published in 1977 [1]
Besides the accelerometer-type fiber-optic vector hydrophone (FOVH), Naval Research Laboratory (NRL) has reported a velocity-style vector sensor on basis of a distributed feedback fiber laser (DFB FL) bonded on a planar cantilever, which has pioneered in detecting the underwater acoustic particle velocity [94 96]
Summary
Fiber-optic hydrophone (FOH) is a new generation of underwater acoustic sensor, which uses fiber as the medium of signal transmission and sensing. It has a variety of advantages such as high sensitivity, large dynamic range, small size, light weight, immunity to electromagnetic interference, and ease to large-scale arrays, so it has attracted wide attention since the first paper about FOH published in 1977 [1]. The ocean oil-gas exploitation has extended from continental shelf to the deep sea and the request of stratigraphic structure resolution has become higher, which puts forward new requirements to the FOH array To satisfy these requirements, many new techniques in the FOH field have been proposed and researched in detail. We review the recent progress in FOH from the aforementioned five aspects
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