对干涉型集成光学陀螺（IIOG）和谐振型集成光学陀螺(RIOG)进行了比较。为使两者具有可比性，两种陀螺采用相同参数的光路器件、相近的偏置调制方法以及相同面积和传输损耗的光波导萨尼亚克（Sagnac）效应敏感环。推导了采用方波调制的干涉型集成光学陀螺和采用三角波调制的谐振型集成光学陀螺的散粒噪声灵敏度的准确表达式，通过优化波导器件参数计算得到两种陀螺最优的散粒噪声灵敏度。结果表明：随着光波导传输损耗的降低，干涉型集成光学陀螺的散粒噪声灵敏度要优于谐振型集成光学陀螺。随着超低损耗光波导技术的发展，干涉型集成光学陀螺在精度提高上具有较大潜力。

This paper compares the interferometric integrated optic gyro (IIOG) and the resonant integrated optic gyro (RIOG). In order to make them comparable, the two kinds of gyros use devices with the same parameters, similar bias modulation methods and planar waveguides with the same footprint and the same propagation loss for Sagnac effect sensing. Firstly, the exact expressions of the shot-noise-limited sensitivities of the IIOG using the square wave modulation and the RIOG using the triangular wave modulation are derived. Then the optimized shot-noise-limited sensitivities of the two kinds of gyros are calculated by optimizing the waveguides parameters. Results show that as the propagation loss of the planar waveguide decreases, the IIOG has better shot-noise-limited sensitivity than the RIOG. As the manufacturing technology of the ultra-low loss planar waveguide develops, the IIOG has much potential in sensitivity improving.