In order to optimize the parameters of resonant fiber optic gyroscope(RFOG)resonator with a broadband light source,the RFOG resonant characteristics are analyzed.Firstly,based on the theory of optical field transmission,the analysis of the transmission characteristics of the broadband spectrum RFOG optical field is completed,and a model of the resonance frequency difference curve of the broadband spectrum RFOG is established.The expression of the resonance characteristic parameters is given.By comparison,it is found that the gyro finesse and FWHM of the broadband spectrum RFOG are approximately 1/2 and 2 times the spectral curve of the resonant cavity.Secondly,based on the theoretical model of broadband spectrum RFOG optical field,the effects of key optical parameters such as coupler cross coupling coefficient,additional loss and cavity length on the precision and limit sensitivity of the gyroscope are analyzed.Finally,the experimental results show that the theoretical analysis of the resonant characteristics is correct,and the zero bias instability of the RFOG is 0.059 º/h by optimizing the resonator parameters,which can provides theoretical guidance for the engineering design of RFOGs.
resonant fiber optic gyroscopebroadband spectrum light sourceresonance characteristicsfiber ring cavity
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