Self-reliance and independently developed high-finesse spherical ultrastable optical reference cavity

doi:10.7498/aps.66.080601

	Self-reliance and independently developed high-finesse spherical ultrastable optical reference cavity
	Liu Jun 1,2; Chen Bo-Xiong 3; Xu Guan-Jun 2; Cui Xiao-Xu 3; Bai Bo 3; Zhang Lin-Bo 2; Chen Long 2; Jiao Dong-Dong 2; Wang Tao 3; Liu Tao 2
刊名	ACTA PHYSICA SINICA
	2017-04-20
卷号	66 期号:8 页码:10
关键词	ultra-stable cavity ultra low expansion finesse optical clock
ISSN号	1000-3290
DOI	10.7498/aps.66.080601
英文摘要	Ultra-stable reference cavity with high finesse is a crucial component in a narrow-linewidth laser system which is widely used in time and frequency metrology, the test of Lorentz invariance, and measure of gravitational wave. In this paper, we report the recent progress of the self-made spherical reference cavity, aiming at the future space application. The main function of cavity is the reference of ultra-stable laser, which is the local reference oscillation source of space optical clock. The diameter of the designed spherical cavity spacer made of ultra-low expansion glass is 80 mm, and the cavity length is 78 mm, flat-concave mirrors configuration, and the radius of the concave mirror is 0.5 m. The support structure is designed to have two 3.9 mm-radius spherical groves located at the poles of the sphere along the diameter direction (defined as support axis), and a 53 angle between the support axis and the optical axis. The mechanic vibration sensitivities of the cavity along and perpendicular to the optical axis are both calculated by finite element analysis method to be below 1 x 10-(10) /g. Five-axis linkage CNC machining sphere forming technology is applied to S phi 80 mm spherical surface processing with spherical contour degree up to 0.02. After a three-stage surface polishing processes, the fused silicamirror substratessurface roughness is measured to be less than 0.2 nm (rms). Implementing double ion beam sputtering technique for mirror coating, the reflection of the coating achieves a reflectivity of > 99.999% and a loss of < 4 ppm for 698 nm laser. The coating surface roughness is measured to be < 0.3 nm (rms). The cavity spacer and the mirror are bonded by dried optical contact. In order to improve the thermal noise characteristics of the cavity, an ultra low expansion ring is contacted optically to the outer surface of the mirror. The cavity is characterized by ring-down spectroscopy, and the finesse is around 195000. With the help of a homemade 698 nm ultra narrow line-width laser, the cavity line-width is measured to be 9.8 kHz by sweeping cavity method. A 698 nm semiconductor laser is locked to this spherical cavity by PDH technology, and the cavity loss is measured to be< 5 ppm.
资助项目	Special Fund for Research on National Major Research Instruments and Facilities of National Natural Science Foundation of China[61127901] ; Young Scientists Fund of the National Natural Science Foundation of China[11403031] ; National Natural Science Foundation of China[11273024] ; National Natural Science Foundation of China[61025023]
WOS关键词	THERMAL-NOISE ; FREQUENCY STABILIZATION ; ATOMIC CLOCK ; LASER ; DEPOSITION ; THICKNESS ; COATINGS ; COMPACT ; PHASE ; FILMS
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000402757400003
资助机构	Special Fund for Research on National Major Research Instruments and Facilities of National Natural Science Foundation of China ; Special Fund for Research on National Major Research Instruments and Facilities of National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special Fund for Research on National Major Research Instruments and Facilities of National Natural Science Foundation of China ; Special Fund for Research on National Major Research Instruments and Facilities of National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special Fund for Research on National Major Research Instruments and Facilities of National Natural Science Foundation of China ; Special Fund for Research on National Major Research Instruments and Facilities of National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special Fund for Research on National Major Research Instruments and Facilities of National Natural Science Foundation of China ; Special Fund for Research on National Major Research Instruments and Facilities of National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://210.72.145.45/handle/361003/11388]
专题	中国科学院国家授时中心
通讯作者	Liu Tao
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Natl Time Serv Ctr, Time & Frequency Stardard Lab, Xian 710600, Peoples R China 3.Avic Xian Fight Automat Control Res Inst, Xian 710065, Peoples R China
推荐引用方式 GB/T 7714	Liu Jun,Chen Bo-Xiong,Xu Guan-Jun,et al. Self-reliance and independently developed high-finesse spherical ultrastable optical reference cavity[J]. ACTA PHYSICA SINICA,2017,66(8):10.
APA	Liu Jun.,Chen Bo-Xiong.,Xu Guan-Jun.,Cui Xiao-Xu.,Bai Bo.,...&Zhang Shou-Gang.(2017).Self-reliance and independently developed high-finesse spherical ultrastable optical reference cavity.ACTA PHYSICA SINICA,66(8),10.
MLA	Liu Jun,et al."Self-reliance and independently developed high-finesse spherical ultrastable optical reference cavity".ACTA PHYSICA SINICA 66.8(2017):10.