基于球形蓝宝石的回音壁模式谐振器温度计。

Spherical-sapphire-based whispering gallery mode resonator thermometer.

作者信息

Yu Lili, Fernicola V

机构信息

INRIM, Strada delle Cacce 91, 10135 Turin, Italy.

出版信息

Rev Sci Instrum. 2012 Sep;83(9):094903. doi: 10.1063/1.4746991.

DOI:10.1063/1.4746991

PMID:23020404

Abstract

A novel microwave whispering gallery mode (WGM) resonator based on a spherical sapphire crystal was developed at INRIM and its use as a thermometer was tested. The temperature dependence of the WGM frequencies was studied and the most promising resonance near to 13.6 GHz, with a loaded quality factor as large as 82 000, was carefully investigated. Its potential use in thermometry was evaluated through a study of its main metrological characteristics, such as the temperature sensitivity, the frequency stability, the repeatability, and the resolution at several temperatures over the temperature range -40 °C to 85 °C. Finally, the INRIM spherical sapphire thermometer was compared with the NIST SWGT, a dielectric thermometer based on a cylindrical sapphire resonator [V. B. Braginsky, V. S. Ilchenko, and Kh. S. Bagdassarov, Phys. Lett. A 120(3), 300 (1987)].

摘要

意大利国家计量研究院（INRIM）研发了一种基于球形蓝宝石晶体的新型微波回音壁模式（WGM）谐振器，并测试了其作为温度计的用途。研究了WGM频率与温度的关系，并对最有前景的接近13.6 GHz的共振进行了仔细研究，其加载品质因数高达82000。通过研究其主要计量特性，如温度灵敏度、频率稳定性、重复性以及在-40°C至85°C温度范围内几个温度点的分辨率，评估了其在温度测量中的潜在用途。最后，将INRIM球形蓝宝石温度计与美国国家标准与技术研究院（NIST）的SWGT进行了比较，SWGT是一种基于圆柱形蓝宝石谐振器的介电温度计[V. B. 布拉金斯基、V. S. 伊尔琴科和Kh. S. 巴格达萨罗夫，《物理快报A》120(3)，300(1987)]。