General calibration system and method of phase shift sensitivity based on optical phase demodulator
A demodulation system and calibration system technology, which is applied to instruments, using wave/particle radiation, measuring devices, etc., can solve problems such as poor calibration accuracy, and achieve the effects of simple operation, low measurement uncertainty, and wide calibration frequency.
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[0016] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0017] The invention relates to a general calibration system for phase shift sensitivity of an optical phase demodulator. The calibration system can accurately calibrate the phase shift sensitivity of a phase interference optical fiber hydrophone. The system is used for phase shift sensitivity calibration of phase interference fiber optic hydrophone. The calibration system consists of four subsystems: control and management system, underwater acoustic signal transmitting system, optical phase demodulation system and electrical signal receiving system. The optical phase demodulation subsystem in the present invention uses the OPD4000 demodulator for optical signal processing, and the internal signal processing principle process of OPD4000 is as follows figure 1 As shown, it is possible to demodulate the phase of the interference light in real time and use the ...
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