arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2408.09290physics.opticsphysics.atom-phphysics.ins-det
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光学双音时间传递

Optical Two-Tone Time Transfer

Jonathan D. Roslund, Abijith S. Kowligy, Junichiro Fujita, Micah P. Ledbetter, Akash V. Rakholia, Martin M. Boyd, Jamil R. Abo-Shaeer, Arman Cingöz

AI总结:

本研究提出一种双音光学时间传递方案,降低硬件要求且适配光纤与自由空间网络,在百米自由空间链路实现亚飞秒级长时同步,还完成了碘光学时钟的频率同步与多日比对,装置可兼容全光子集成。

摘要:

亚皮秒级时序同步可支撑未来的光学授时网络,包括GHz级相干相控阵雷达成像、用于秒定义修订的洲际时钟比对、测时水准测量,以及远程资产(包括未来星载光学时间标准)的同步。随着光学时钟现已应用于移动平台,具备匹配性能且可在平台运动条件下运行的自由空间同步网络,对拓展精密授时的覆盖范围至关重要。近期,飞秒(fs)级光学时间传递技术已被开发出来,即便存在大气湍流、信号衰减和中断,仍可在数百公里距离上运行。本文报道了一种性能相当的双音光学时间传递方案,该方案降低了硬件要求,可同时支持光纤和自由空间网络。利用该技术,研究人员在约100米的自由空间链路上实现了持续数小时的亚飞秒同步。此外,该链路还被用于同步两台碘光学时钟的频率,随后开展了为期四天的时钟比对。该实验装置采用了集成光子收发器和电信波段激光器,可与全光子集成兼容。

英文摘要:

Sub-picosecond timing synchronization can enable future optical timekeeping networks, including coherent phased array radar imaging at GHz levels, intercontinental clock comparisons for the redefinition of the second, chronometric leveling, and synchronization of remote assets, including future satellite-based optical time standards. With optical clocks now operating on mobile platforms, free-space synchronization networks with compatible performance and the ability to operate under platform motion are essential to expand the reach of precision timing. Recently, femtosecond (fs)-level optical time-transfer techniques have been developed that can operate over hundreds of kilometers despite atmospheric turbulence, signal fade, and dropouts. Here we report a two-tone optical time transfer scheme with comparable performance that reduces hardware requirements and can support both fiber and free-space networks. Using this technique, sub-fs synchronization was demonstrated over a $\sim$100 m free-space link for several hours. In addition, the link was used to syntonize two iodine optical clocks and then compare them over four days. The set-up employs an integrated photonics transceiver and telecom-band lasers that are compatible with full photonic integration.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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