Komachiya M, Sonobe H, Oho S, Ohbu K, Yuhara T, Lizuka H
Appl Opt. 1996 Jul 1;35(19):3719-25. doi: 10.1364/AO.35.003719.
A proposed method of secondary phase modulation for open-loop fiber-optic gyroscopes is examined in general terms. To detect the rotation rate of a system through a beat-frequency channel, we employ linearly combined signals with different frequencies for the optical phase modulation. We find that the proper combinations of the modulation frequencies can optimize the sensitivity of gyroscopes. With this method we can employ a high-frequency band for optical phase modulations while keeping relative a lower-frequency band of the detection channel. The theoretically derived result is experimentally confirmed by using a lithium-niobate (LiNbO(3)) optical phase modulator. We also discuss the combination setup with an optical integrated-circuit device and digital signal processing.
本文从总体上研究了一种用于开环光纤陀螺仪的二次相位调制方法。为了通过拍频通道检测系统的旋转速率，我们将不同频率的信号进行线性组合用于光相位调制。我们发现调制频率的适当组合可以优化陀螺仪的灵敏度。通过这种方法，我们可以在保持检测通道相对较低频段的同时，将高频段用于光相位调制。理论推导结果通过使用铌酸锂（LiNbO(3)）光相位调制器得到了实验验证。我们还讨论了与光集成电路器件和数字信号处理的组合设置。
