Research On The Digital Interferometric Fiber Optic Sensor To Fringe Subdivision Technique

Digital interferometric fiber optic sensor with virtues of high definition, strong anti-interference ability, tending to signal processing and storage and being convenient for distant transmission has high military and industrial worth. For a long time it gets recognition all along in many countries. Today the research level in our country, researching in theory commonly and practicability being bad, has biggish difference comparing to other countries. So it is importunate for our country's modernization national defense construction to obtain break in technology.This paper introduces the basic work theory of fiber optic sensor and PGC demodulation project, analyzes traditional fiber sensor unit, analyzes and emulates fringe subdivision of digital interferometric fiber sensor, proves this project's feasibility and correctness and gets some valuable conclusion. The research result has very important significance for fringe subdivision project using digital interferometric fiber sensor and increasing examining ability and scope for big phase hydrosonic signal.The article completes the software and hardware design of digital interferometric fiber sensor fringe subdivision, realizes system time impulse control and designs signal processing circuit of pivotal part. These reach expectant object.