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2018 Thermal-noise-limited higher-order mode locking of a reference cavity

发布时间:2018-04-09          来源:           浏览次数:

X. Y. ZENG,1 Y. X. YE,1 X. H. SHI,1 Z. Y. WANG,1 K. DENG,1 J. ZHANG,1,* AND Z. H. LU1,2
1 MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
2 e-mail: zehuanglu@mail.hust.edu.cn
*Corresponding author: jie.zhang@mail.hust.edu.cn

Higher-order mode locking has been proposed to reduce the thermal noise limit of reference cavities. By locking a laser to the HG02 mode of a 10-cm long all ultra-low expansion (ULE) cavity and measuring its performance with the three-cornered-hat method among three independently stabilized lasers, we demonstrate a thermal-noise-limited performance of a fractional frequency instability of 4.9 × 10?16.
The results match the theoretical models with higher-order optical modes. The achieved laser instability improves the all ULE short cavity results to a new low level. ? 2018 Optical Society of America


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