发表机构
Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China; Hefei National Laboratory, University of Science and Technology of China; State Key Laboratory of Chemical Reaction Dynamics, Department of Chemical Physics, University of Science and Technology of China（中国科学技术大学微尺度物质科学国家研究中心; 中国科学技术大学合肥国家实验室; 中国科学技术大学化学物理系化学反应动力学国家重点实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出一种基于双腔熔融石英折射仪的便携式光学压力标准，通过差分测量消除共模误差，以射频扫描替代反馈锁定，实现3.4 ppm重复性，为现场量子可追溯压力校准提供实用方案。
AI 中文摘要
下一代压力标准正朝着基于光学、可现场部署的系统方向发展。然而，现有的大多数光学折射法压力标准依赖于笨重的超低膨胀（ULE）腔体和复杂的反馈锁定，限制了其便携性和现场适用性。在此，我们提出了一种基于单块普通熔融石英加工而成的双通道法布里-珀罗腔的小型化、可运输的光学压力计。通过采用抽真空参考腔与暴露于气体的测量腔之间的差分测量，热膨胀和压力引起的形变等共模误差在很大程度上被抵消，从而能够使用低成本的熔融石英实现与ULE相当的性能。射频扫描配合洛伦兹拟合取代了传统的反馈锁定，简化了光学设计并提高了鲁棒性。经活塞压力计校准后，该装置表现出3.4 ppm的测量重复性和总不确定度\\(u = \sqrt{(10.6\times10^{-6}p)^2 + (5.4~\mathrm{mPa})^2}\\)。该系统能够分辨来自活塞压力计的周期性压力波动，并表现出优越的响应速度。凭借其小尺寸、便携性以及对外部频率参考的独立性，这种熔融石英双腔压力计为现场、量子可追溯的压力校准提供了一条实用途径。
英文摘要
The next-generation pressure standard is moving toward optical-based, field-deployable systems. However, most existing optical refractometry pressure standards rely on bulky ultra-low expansion (ULE) cavities and complex feedback locking, limiting their portability and on-site applicability. Here, we present a miniaturized, transportable optical pressure manometer based on a dual-channel Fabry-Perot cavity machined from a single block of common fused silica. By employing a differential measurement between an evacuated reference cavity and a gas-exposed measurement cavity, common-mode errors such as thermal expansion and pressure-induced deformation are largely canceled, enabling the use of low-cost fused silica to achieve performance comparable to ULE. Radio-frequency scanning with Lorentzian fitting replaces conventional feedback locking, simplifying the optical design and improving robustness. Calibrated against a piston manometer, the device demonstrates a measurement repeatability of 3.4~ppm and a total uncertainty of \(u = \sqrt{(10.6\times10^{-6}p)^2 + (5.4~\mathrm{mPa})^2}\). The system can resolve periodic pressure fluctuations originating from the piston manometer and exhibits superior response speed. With its small footprint, portability, and independence from external frequency references, this fused-silica dual-cavity manometer offers a practical route toward on-site, quantum-traceable pressure calibration.
Comments8 pages, 4 figures
