Author Affiliations
Abstract
Key Laboratory of Instrumentation Science and Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China
The resonator integrated optic gyros (RIOGs) based on the Sagnac effect have gained extensive attention in navigation and guidance systems due to their predominant advantages: high theoretical accuracy and simple integration. However, the problems of losing lock and low lock-in accuracy are the bottlenecks, which restrict the development of digital RIOGs. Therefore, a multilevel laser frequency lock-in technique has been proposed in this Letter to address these problems. The experimental results show that lock-in accuracy can be improved one order higher and without losing lock in a variable temperature environment. Then, a digital miniaturized RIOG prototype (18 cm × 18 cm × 20 cm) has been produced, and long-term (1 h) bias stability of 26.6 deg/h is successfully demonstrated.
060.2800 Gyroscopes 120.5790 Sagnac effect 140.5960 Semiconductor lasers Chinese Optics Letters
2018, 16(4): 040601
中北大学电子测试技术重点实验室, 山西 太原 030051
为了满足偏振光天文导航定位对高精度太阳空间位置信息的需求, 提出一种基于瑞利大气偏振模式的太阳自主定位方法。实验结果表明, 该定位方法能够获取太阳相对可靠的地理位置信息, 且经、纬度误差均值分别为0.251°和0.171°。虽然该方法的定位精度有待于进一步提高, 但其作为其他定位方式的补充有着重要应用价值。
散射 太阳位置 偏振光定位 最小二乘法 Rayleigh散射 激光与光电子学进展
2017, 54(2): 022901
