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Driver of acousto-optic modulator

An acousto-optic modulator and drive device technology, which is applied to measuring devices, instruments, and measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problem that the acousto-optic modulator cannot accurately obtain the orthogonal signal of the demodulation algorithm, and achieve simple structure, Improve the performance of system indicators

Inactive Publication Date: 2016-02-03
WEIHAI BEIYANG PHOTOELECTRIC INFORMATION TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that the existing acousto-optic modulator cannot accurately obtain the quadrature signal required by the demodulation algorithm, the present invention provides an acousto-optic modulator drive device that can accurately obtain the quadrature signal required by the demodulation algorithm

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  • Driver of acousto-optic modulator

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Embodiment Construction

[0016] Referring to the accompanying drawings, the present invention will be further described in detail with specific embodiments.

[0017] Such as figure 1 As shown, the acousto-optic modulator driving device includes a direct digital synthesizer 1, a controller 2, a communication interface 3, a current-to-voltage circuit 4, a pulse modulation circuit 5, a power amplifier circuit 6, an impedance matching circuit 7, a filter circuit 8, a radio frequency Output signal interface 9, crystal oscillator 10, clock distributor 11, synchronous clock output interface 12, quadrature analog signal output interface 13 and pulse trigger signal interface 14, the output end of controller 2 is connected to one input end of direct digital synthesizer 1 , the communication interface 3 is connected to the input end of the controller 2, one output end of the direct digital synthesizer 1 is connected to the input end of the current-to-voltage circuit 4, and the output end of the current-to-voltag...

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Abstract

The invention relates to a driver of an acousto-optic modulator, and aims at solving the technical problem that a present acousto-optic modulator cannot accurately obtain orthogonal signals needed by a demodulation algorithm. The driver comprises a direct digital synthesizer, a controller, a current-to-voltage circuit, an orthogonal analog signal output interface and a pulse modulation circuit, wherein the output end of the controller is connected with the input end of the direct digital synthesizer, one output end of the direct digital synthesizer is connected with the input end of the current-to-voltage circuit, the output end of the current-to-voltage circuit is connected with the orthogonal analog signal output interface, and the other output end of the direct digital synthesizer is connected with the input end of the pulse modulation circuit. The driver can be widely applied to heterodyne type hydrophone systems.

Description

technical field [0001] The invention relates to a driving device, in particular to an acousto-optic modulator driving device. Background technique [0002] Optical fiber hydrophone is a new type of sensor based on optical fiber and optoelectronic technology. It converts underwater acoustic signals into optical signals through high-sensitivity optical fiber coherent detection. The fiber optic hydrophone can sensitively reflect the small changes in the optical phase shift, but at the same time it also converts the linear relationship between the optical phase shift and the sound pressure signal into a nonlinear relationship between the light intensity and the sound pressure signal. Therefore, it must The sound pressure signal is extracted from the output light signal of the fiber optic hydrophone by signal demodulation technology. [0003] Signal detection technology is one of the most basic and key technologies of interferometric fiber optic hydrophones. The demodulation m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00
Inventor 史振国王建强李德和刘伟贺春芝尹虎郑旭东李昌杰孙玉佩
Owner WEIHAI BEIYANG PHOTOELECTRIC INFORMATION TECH
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