期刊
PHYSICAL REVIEW LETTERS
卷 119, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.243601
关键词
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资金
- JILA Physics Frontier Center (NSF) [PHY-1734006]
- National Institute of Standards and Technology
- Defense Advanced Research Projects Agency
- Centre for Quantum Engineering and SpaceTime Research (QUEST)
- Physikalisch-Technische Bundesanstalt
- European Metrology Programme for Innovation and Research (EMPIR) [15SIB03 OC18]
- European Union's Horizon 2020 research and innovation program
- Quantum sensors (Q-SENSE) project
- European Union's Horizon 2020 Research and Innovation Staff Exchange (RISE) Horizon 2020 program [691156]
- National Defense Science and Engineering Graduate Fellowship
- National Research Council postdoctoral fellowship
- Marie Curie Actions (MSCA) [691156] Funding Source: Marie Curie Actions (MSCA)
We report on a laser locked to a silicon cavity operating continuously at 4 K with 1 x 10(-16) instability and a median linewidth of 17 mHz at 1542 nm. This is a tenfold improvement in short-term instability, and a 10(4) improvement in linewidth, over previous sub-10-K systems. Operating at low temperatures reduces the thermal noise floor and, thus, is advantageous toward reaching an instability of 10(-18), a long-sought goal of the optical clock community. The performance of this system demonstrates the technical readiness for the development of the next generation of ultrastable lasers that operate with an ultranarrow linewidth and long-term stability without user intervention.
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