Purification technique with a hertz-linewidth laser for fiber-based optical frequency coherence dissemination

doi:10.1016/j.yofte.2024.103923

NTSC-IR > 量子频标研究室

	Purification technique with a hertz-linewidth laser for fiber-based optical frequency coherence dissemination
	Wang, Dan 1,2,3; Liu, Jie 1,3; Jiao, Dongdong 1,3; Zang, Qi 1,3; Zhang, Xiang 1,3; Zhou, Qian 1,2,3; Zhang, Yucan 1,2,3; Xu, Guanjun 1,3; Dong, Ruifang 1,3; Liu, Tao 1,3; Zhang, Shougang 1,3
	2024-10-01
发表期刊	OPTICAL FIBER TECHNOLOGY
ISSN	1068-5200
卷号	87 页码:6
摘要	We propose a purification relay station for optical frequency dissemination over long-distance communication fiber links particularly in complex environments. This technique addresses the challenge of phase noise suppression limitation due to dissemination delay in laser traversing fiber links. Utilizing a cavity-stabilized hertzlinewidth laser, we synchronized the phase noise with that of the signal received from the previous link within a 10 Hz bandwidth. Beyond this range, the phase noise followed the hertz-linewidth laser, decreasing from 20 rad to 6 rad. Furthermore, to ensure continuous coherence and stability of the disseminated laser, the data processing based on FPGA was employed to eliminate phase cycle slips in the previously disseminated optical frequency. We applied this technique to the optical frequency disseminated along with a 106 km communication fiber link. After optical frequency purification, the fractional frequency instability at a 1 s averaging time is reduced by a factor of three. Additionally, with the elimination of the phase cycle slips, the fractional frequency instability of purified optical frequency scales as 1 tau which matches with a signal dominated by phase-modulated white noise. At a 10,000 s averaging time, the purified optical frequency achieves a stability of 8.43 x 10-19, representing a reduction of two orders of magnitude compared to that of the previously disseminated optical frequency. This work establishes the foundation for the development of a nationwide optical frequency dissemination network involving long-distance fiber links in complex environments.
关键词	Purification technique Hertz-linewidth laser Optical frequency dissemination Fiber network
DOI	10.1016/j.yofte.2024.103923
关键词[WOS]	NETWORK ; LINK
语种	英语
WOS研究方向	Engineering ; Optics ; Telecommunications
WOS类目	Engineering, Electrical & Electronic ; Optics ; Telecommunications
WOS记录号	WOS:001284266700001
出版者	ELSEVIER SCIENCE INC
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/14491
专题	量子频标研究室
通讯作者	Dong, Ruifang; Liu, Tao
作者单位	1.Chinese Acad Sci, Natl Time Serv Ctr, Xian, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Key Lab Time Reference & Applicat, Xian, Peoples R China
推荐引用方式 GB/T 7714	Wang, Dan,Liu, Jie,Jiao, Dongdong,et al. Purification technique with a hertz-linewidth laser for fiber-based optical frequency coherence dissemination[J]. OPTICAL FIBER TECHNOLOGY,2024,87:6.
APA	Wang, Dan.,Liu, Jie.,Jiao, Dongdong.,Zang, Qi.,Zhang, Xiang.,...&Zhang, Shougang.(2024).Purification technique with a hertz-linewidth laser for fiber-based optical frequency coherence dissemination.OPTICAL FIBER TECHNOLOGY,87,6.
MLA	Wang, Dan,et al."Purification technique with a hertz-linewidth laser for fiber-based optical frequency coherence dissemination".OPTICAL FIBER TECHNOLOGY 87(2024):6.