Frequency response testing of fiber optic gyroscope based on the magneto-optic Faraday effect

A testing principle was developed for whole frequency band response testing problems in fiber optic gyroscopes based on the magneto-optic Faraday effect of the gyroscope. The transmission in the fiber coil was modeled using finite element analyse (FEA). The gyroscope's Faraday effect output model was derived assuming a high birefringence optical fiber and packaged fiber coil. The Faraday effect output is proportional to the magnetic field intensity. This method was compared with the dynamic test turn table method based on the principles of the gyroscope detection method. Experimental tests of the Faraday effect agree with the analytical results. This method eliminates the low frequency output limitation of the dynamic test turn table and can be used to test the whole frequency band response of the gyroscope.