An efficient source of frequency anti-correlated entanglement at telecom wavelength

doi:10.1007/s00340-016-6402-3

	An efficient source of frequency anti-correlated entanglement at telecom wavelength
	Hou, Feiyan 1,2; Xiang, Xiao 1,2; Quan, Runai 1,2; Wang, Mengmeng 1,2; Zhai, Yiwei 1,2; Wang, Shaofeng 1,2; Liu, Tao 1; Zhang, Shougang 1; Dong, Ruifang 1
刊名	APPLIED PHYSICS B-LASERS AND OPTICS
	2016-05-01
卷号	122 期号:5 页码:8
ISSN号	0946-2171
DOI	10.1007/s00340-016-6402-3
英文摘要	We demonstrate an efficient generation of frequency anti-correlated entangled photon pairs at telecom wavelength. The fundamental laser is a continuous-wave high-power fiber laser at 1560 nm, through an extracavity frequency doubling system, a 780-nm pump with a power as high as 742 mW is realized. After single-passing through a periodically poled KTiOPO4 (PPKTP) crystal, degenerate down-converted photon pairs are generated. With an overall detection efficiency of 14.8 %, the count rates of the single photons and coincidence of the photon pairs are measured to be 370 kHz and 22 kHz, respectively. The spectra of the signal and idler photons are centered at 1560.23 and 1560.04 nm, while their 3-dB bandwidths being 3.22 nm both. The joint spectrum of the photon pair is observed to be frequency anti-correlated and have a spectral bandwidth of 0.52 nm. According to the ratio of the single-photon spectral bandwidth to the joint spectral bandwidth of the photon pairs, the degree of frequency entanglement is quantified to be 6.19. Based on a Hong-Ou-Mandel interferometric coincidence measurement, a frequency indistinguishability of 95 % is demonstrated. The good agreements with the theoretical estimations show that the inherent extra intensity noise in fiber lasers has little influence on frequency entanglement of the generated photon pairs.
资助项目	National Natural Science Foundation of China[11174282] ; National Natural Science Foundation of China[91336108] ; National Natural Science Foundation of China[61127901] ; Youth Talent Support Plan of the Organization Department of China ; Key Fund of the Western light Talent Cultivation Plan of the CAS, China ; Cross and Cooperative Science and Technology Innovation Team Project of the CAS, China
WOS关键词	CLOCK SYNCHRONIZATION ; QUANTUM ENTANGLEMENT ; PHOTON PAIRS ; LASER ; KTIOPO4 ; PHASE ; GENERATION ; LINEWIDTH ; COHERENCE ; AMPLIFIER
WOS研究方向	Optics ; Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000378778600023
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Talent Support Plan of the Organization Department of China ; Youth Talent Support Plan of the Organization Department of China ; Key Fund of the Western light Talent Cultivation Plan of the CAS, China ; Key Fund of the Western light Talent Cultivation Plan of the CAS, China ; Cross and Cooperative Science and Technology Innovation Team Project of the CAS, China ; Cross and Cooperative Science and Technology Innovation Team Project of the CAS, China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Talent Support Plan of the Organization Department of China ; Youth Talent Support Plan of the Organization Department of China ; Key Fund of the Western light Talent Cultivation Plan of the CAS, China ; Key Fund of the Western light Talent Cultivation Plan of the CAS, China ; Cross and Cooperative Science and Technology Innovation Team Project of the CAS, China ; Cross and Cooperative Science and Technology Innovation Team Project of the CAS, China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Talent Support Plan of the Organization Department of China ; Youth Talent Support Plan of the Organization Department of China ; Key Fund of the Western light Talent Cultivation Plan of the CAS, China ; Key Fund of the Western light Talent Cultivation Plan of the CAS, China ; Cross and Cooperative Science and Technology Innovation Team Project of the CAS, China ; Cross and Cooperative Science and Technology Innovation Team Project of the CAS, China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Talent Support Plan of the Organization Department of China ; Youth Talent Support Plan of the Organization Department of China ; Key Fund of the Western light Talent Cultivation Plan of the CAS, China ; Key Fund of the Western light Talent Cultivation Plan of the CAS, China ; Cross and Cooperative Science and Technology Innovation Team Project of the CAS, China ; Cross and Cooperative Science and Technology Innovation Team Project of the CAS, China
内容类型	期刊论文
源URL	[http://210.72.145.45/handle/361003/11171]
专题	中国科学院国家授时中心
通讯作者	Dong, Ruifang
作者单位	1.Chinese Acad Sci, Key Lab Time & Frequency Primary Stand, Natl Time Serv Ctr, Xian 710600, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Hou, Feiyan,Xiang, Xiao,Quan, Runai,et al. An efficient source of frequency anti-correlated entanglement at telecom wavelength[J]. APPLIED PHYSICS B-LASERS AND OPTICS,2016,122(5):8.
APA	Hou, Feiyan.,Xiang, Xiao.,Quan, Runai.,Wang, Mengmeng.,Zhai, Yiwei.,...&Dong, Ruifang.(2016).An efficient source of frequency anti-correlated entanglement at telecom wavelength.APPLIED PHYSICS B-LASERS AND OPTICS,122(5),8.
MLA	Hou, Feiyan,et al."An efficient source of frequency anti-correlated entanglement at telecom wavelength".APPLIED PHYSICS B-LASERS AND OPTICS 122.5(2016):8.