Underwater acoustic detection device based on photoelectric oscillator
A technology of photoelectric oscillators and detection devices, which is applied to measuring devices, instruments, and measuring ultrasonic/sonic/infrasonic waves. The effect of flexible design and fast demodulation rate
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[0041] In order to solve various restrictive problems of the aforementioned fiber grating hydrophone technology, an embodiment of the present invention proposes an underwater acoustic detection device based on a photoelectric oscillator. Among them, the optoelectronic oscillator is an optically generated microwave scheme based on microwave photonics technology, which can generate microwave signals with high Q value, low phase noise and high stability. The photoelectric oscillator is a positive feedback resonant cavity structure composed of a laser source, a phase modulator, an optical fiber, a photodetector, a microwave amplifier, a filter, and a power divider. Its working process is: the laser source generates a continuous Light, modulated by a phase modulator, enters a narrowband fiber grating filter with a special structure, filters out a sideband, and then is converted into an electrical signal by a photodetector; the electrical signal is divided by a power divider after pa...
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