Researching Of Low Intervene Fiber-Optic Gyroscope

The interferometeric fiber-optic gyroscope (IFOG) attracts considerable researchers because of its distinguishing performance. In our country, fiber-optical gyroscope is looked as one of key technologies in the domain of inertial navigation .However, the research on medium-precision and low-precision IFOG takes possession of market perspective, which makes a thorough revolutionary on society.The paper analyzes the principle of IFOG and the technology on wide-spectrum, from the request of the medium-precision and low-precision IFOG system, one schemes of low intervene IFOG are designed. These schemes not only overcome the detection error, resulted from the fluctuation of optical source's frequency and power and from bias-vibration's direction, but also provide excellent stability and repetition. With the aim of improving the detection sensitivity, the technology on multiple width-spectrum optical source is used. These schemes are simulated and prove true. Form the low intervene open-loop IFOG, the detailed design process of circuit diagram is proposed. The method of inverse convolution is used to eliminate the detect error, brought by CCD detector.At the same time, the paper analyzes these factors that bring about non-reciprocal phase drift of IFOG in detail and point out elimination approaches. These are meaningful to the research and development of medium-precision and low-precision IFOG.