Opt Lett. 2018 Jun 15;43(12):2799-2802. doi: 10.1364/OL.43.002799.
A novel scheme for angular velocity measurement is proposed and demonstrated by using an optoelectronic oscillator (OEO) incorporating a Sagnac interferometer. In the OEO resonant cavity, the optical carrier (OC) and the first-order sidebands propagate in opposite directions in the Sagnac loop. Thus, the rotation-induced Sagnac phase difference between the OC and first-order sidebands will produce an oscillating frequency shift of the OEO which is proportional to the rotation angular velocity. Then a high-sensitivity angular velocity measurement is realized by monitoring the oscillating microwave frequency. The system is free from the lock-in problem, and the sensitivity scale is measured to be 51.8 kHz/(rad/s) which is equivalent to a minimally detectable angular velocity of 3.98°/h with a frequency shift of 1 Hz.
提出并演示了一种新颖的角速度测量方案，该方案利用包含萨格纳克干涉仪的光电振荡器（OEO）实现。在 OEO 谐振腔内，光载波（OC）和一阶边带在萨格纳克环中沿相反方向传播。因此，旋转引起的 OC 和一阶边带之间的萨格纳克相位差将产生 OEO 的振荡频率移动，该频率移动与旋转角速度成正比。然后通过监测振荡微波频率来实现高灵敏度的角速度测量。该系统不受锁定问题的影响，并且灵敏度刻度测量为 51.8 kHz/（rad/s），这相当于频率移动 1 Hz 时最小可检测角速度为 3.98°/h。
