Reasearch On The Influence Of Source On Fiber Optic Gyroscope

With the extensive application of fiber optic gyroscope (FOG) to inertial navigationsystem, the improvement of its accuracy becomes the focus of current research. The source’sperformance directly affects the gyroscope’s performance as a significant sensor carrieremission source of FOG.. In order to design a erbium-doped fiber source (EDFS) used inhigh-precision FOG, this paper research the fiber characteristic,polarization and fiberamplifier source for the EDFS.This paper start from the mechanism of light rare earth elements, analyse the basicprinciples of erbium-doped fiber source,and establish a physical model of erbium-doped fibersource, compare with980nm pump and1480nm pump with the advantages and disadvantages,comparative analysis the erbium-doped several basic structure of the EDFS.Secondly, analysis the optical properties of erbium-doped fiber source of FOG, from thedifferent structures of erbium-doped fiber source analysis of the experimental spectrum, fromthree aspects of the spectral width, optical power and spectral asymmetry to analysis theimpact of FOG..Thirdly, the analysis of the polarization effect on the FOG. Theoretical analysis theoptical noise in polarization and birefringence effects, theorety and experiment analysis thepolarization-dependent characteristics of the gain (PDG) effect of EDFS. Comparing thestructure of depolarized erbium-doped fiber source, choosing the depolarization structureEDFS with Lyot depolarizer.Finally, analysis the effect of the fiber amplifier source(FAS) for FOG. According to thecharacteristics of FAS, adopt pump way by forward pump source and backward pump source,through experiments, the structure of the can improve the spectral width and output power ofthe FAS. analysis of the average wavelength stability of FAS. Experiment result show thatcontrol the pump power and pump temperature can reduce the effect to average wavelengthstability of FOG..