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Chin. Phys. B, 2011, Vol. 20(2): 024202    DOI: 10.1088/1674-1056/20/2/024202
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

Realization of double resonance for a bright frequency-tunable source of narrowband entangled photons

Yang Jian(杨剑)a), Zhao Tian-Ming(赵天明) a), Zhang Han(张涵)a), Yang Tao(杨涛)a), Bao Xiao-Hui(包小辉) a)b)†, and Pan Jian-Wei(潘建伟)a)
a Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; b Physikalisches Institut der Universitaet Heidelberg, Philosophenweg 12, Heidelberg 69120, Germany
Abstract  In this paper, we report an interesting phenomenon when precisely adjust the tuning crystal for double-resonance of a type-II configured parametric amplifier cavity, which is later verified as a cavity-enhanced effect in optics alignment. The theoretical result indicates that an angle accuracy error within 0.09o is necessary to achieve a high contrast ratio of 100:1 for a cavity with a finesse of about 205, which is crucial but high-demanding to get a high-quality narrowband entanglement source. Meanwhile, we figure out a method to release such a high requirement and get high visibility in a moderate-accuracy alignment.
Keywords:  optics alignment      double-resonance      cavity-enhanced      narrowband entanglement  
Received:  03 December 2010      Revised:  03 December 2010      Accepted manuscript online: 
PACS:  42.50.Nn (Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)  
  42.50.Ex (Optical implementations of quantum information processing and transfer)  
  03.67.Bg (Entanglement production and manipulation)  
Fund: Project supported by the Science Foundation of the Chinese Academy of Sciences, the National Fundamental Research Program of China (Grant No. 2011CB921300) and the National Natural Science Foundation of China.

Cite this article: 

Yang Jian(杨剑), Zhao Tian-Ming(赵天明), Zhang Han(张涵), Yang Tao(杨涛), Bao Xiao-Hui(包小辉), and Pan Jian-Wei(潘建伟) Realization of double resonance for a bright frequency-tunable source of narrowband entangled photons 2011 Chin. Phys. B 20 024202

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