水下空间中的光学高精度双向时间比对

Optical High-Precision Bidirectional Time Comparison Method in Underwater Space

为探寻水下空间导航定位授时服务的新途径,进一步提升水下空间授时精度,提出一种水下空间中的光学双向时间比对方法,阐述其基本原理和系统组成,利用激光二极管、光束准直器和反射镜等搭建基于玻璃水池的实验系统。最终,实验系统的时间比对结果峰峰值为1.6ns,系统附加时间传递抖动结果为1.05×10^(-11)s/s,6.30×10^(-11)s/10^(3)s。实验结果验证了水下空间中光学双向时间比对方案的可行性,同时纳秒量级的时间比对结果表明具有深入研究的价值。针对实验过程中存在的问题,进行了深入分析和总结,为后续工作和研究提供了理论依据。

To enhance the accuracy of Positioning,Navigation,and Timing(PNT)services in underwater environments,a novel optical high-precision bidirectional time comparison method is proposed.This paper elucidates the basic principle and system components of this method and describes the construction of an experimental system in a glass pool utilizing a laser diode,beam collimator,and mirror.The time comparison results exhibit a peak-to-peak value of 1.6ns,with an additional time transfer jitter of 1.05e^(-11)s/s and 6.30e^(-11)s/10^(3)s.The experimental results verify the feasibility of the optical bidirectional time comparison method in underwater space,and the nanosecond time comparison results show that it is valuable for further research.Moreover,a detailed analysis of experimental challenges provides a foundational understanding for future work and investigations in this area.