Research Of Fibre-optics Hydrophone PGC Demodulation Measure Having Biggish Dynamic Range

Fibre-optics hydrophone is one of important developing items of national defence technology, related to fields of optics, photoelectron, exact mechanism, signal processing technology and so on. Developed countries make a point of doing this research. The main impetus of fibre-optics hydrophone development is counterdiving warfare, the main means of which is sonar, and the core apparatus of sonar is hydrophone. Being maritime sound signal detector of a new generation, fibre-optics hydrophone must have high delicacy and biggish dynamic range.This paper discuses the postulate of phased-carrier interferential fibre-optics hydrophone having farad revolving mirror and corresponded PGC detecting technology. The demodulation scheme of simulation and digital mixture is proposed according to design request, and the total design of system is done. The structure principle and its corresponded target of fibre-optics hydrophone sensor are expounded and circuit of simulation and digital mixture detecting system is discussed detailedly. Every cell of this system is explained in-depth, and problems appeared in system debugging are analyzed and corresponded settle measures are expatiated. The improved measure is proposed in allusion to shortage of this measure.This paper design and debug the simulation and digital mixture PGC detecting system of fibre-optics hydrophone. We find the shortcoming by debug this system, and then analyse the PGC demodulation scheme, bring forward the measures of innovation. The work of this paper has important reference to henceforth research.