国家标准之间的多千瓦波长激光功率测量比较

IF 2.1 3区工程技术 Q2 INSTRUMENTS & INSTRUMENTATION

Metrologia Pub Date : 2024-02-02 DOI:10.1088/1681-7575/ad2538

Kyle A. Rogers, Paul Williams, M. Pastuschek, H. Lecher, Stefan Kueck, Marco A Lopez, John Lehman

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引用次数: 0

摘要

我们在此首次比较了国家计量研究院（NMI）对千瓦级连续波（cw）光功率的高精度测量。美国国家标准与技术研究院（NIST）使用依靠光子动量的功率计进行测量。德国联邦物理技术研究所（PTB）使用改进的现成热功率计进行了测量。非吸收光子动量测量方法允许两个功率计同时测量相同的激光束光路，从而在光学系统的支持下对功率计进行直接比较，以适应仪器沉降时间的差异。结果显示，两台仪器的测量结果在扩大的不确定度范围内一致。NIST 和 PTB 表明，所有功率级别平均结果的等效度为 0.49%，扩展不确定度为 1.37%（k=2）。

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Multi-kilowatt cw laser power measurement comparison between national standards

We present here the first comparison between National Metrology Institutes (NMIs) of high accuracy continuous wave (cw) optical power measurements in the kilowatt regime. The National Institute of Standards and Technology (NIST) performed measurements with a power meter relying on photon momentum. The Physikalisch-Technische Bundesanstalt (PTB) performed measurements with a modified off-the-shelf thermal power meter. The non-absorbing photon momentum measurement approach permits the two power meters to measure the same laser beam optical path simultaneously, resulting in a direct comparison of the meters supported by an optical system to accommodate differences in instrument settling times. The results show agreement within the expanded uncertainties for each instrument. NIST and PTB illustrate a degree of equivalence of 0.49% with an expanded uncertainty of 1.37% (k=2) for an average result across all power levels.

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来源期刊

Metrologia 工程技术-物理：应用

CiteScore

2.80

自引率

25.00%

发文量

137

审稿时长

12 months

期刊介绍： Published 6 times per year, Metrologia covers the fundamentals of measurements, particularly those dealing with the seven base units of the International System of Units (metre, kilogram, second, ampere, kelvin, candela, mole) or proposals to replace them. The journal also publishes papers that contribute to the solution of difficult measurement problems and improve the accuracy of derived units and constants that are of fundamental importance to physics. In addition to regular papers, the journal publishes review articles, issues devoted to single topics of timely interest and occasional conference proceedings. Letters to the Editor and Short Communications (generally three pages or less) are also considered.