OSA's Digital Library

Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 11 — Apr. 10, 2008
  • pp: 1832–1836

Generation of entangled photon pairs using small-coherence-time continuous wave pump lasers

Simone Cialdi, Fabrizio Castelli, Ilario Boscolo, and Matteo G.A. Paris  »View Author Affiliations

Applied Optics, Vol. 47, Issue 11, pp. 1832-1836 (2008)

View Full Text Article

Enhanced HTML    Acrobat PDF (1073 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



We address the generation of entangled photon pairs by parametric downconversion from solid state cw lasers with small coherence time. We consider a compact and low-cost setup based on a two-crystal scheme with type-I phase matching. We reconstruct the full density matrix by quantum tomography and analyze in detail the entanglement properties of the generated state as a function of the crystal’s length and the coherence time of the pump. We verify the possibility to improve the visibility using a purification protocol based on a compensation crystal.

© 2008 Optical Society of America

OCIS Codes
(270.1670) Quantum optics : Coherent optical effects
(270.5290) Quantum optics : Photon statistics

ToC Category:
Quantum Optics

Original Manuscript: November 12, 2007
Revised Manuscript: January 17, 2008
Manuscript Accepted: January 18, 2008
Published: April 8, 2008

Simone Cialdi, Fabrizio Castelli, Ilario Boscolo, and Matteo G. Paris, "Generation of entangled photon pairs using small-coherence-time continuous wave pump lasers," Appl. Opt. 47, 1832-1836 (2008)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. P. G. Kwiat, E. Waks, A. G. White, I. Appelbaum, and P. G. Eberhard, “Ultrabright source of polarization-entangled photons,” Phys. Rev. A 60, R773-R776 (1999). [CrossRef]
  2. D. Dehlinger and M. W. Mitchell, “Entangled photons, nonlocality, and Bell inequalities in the undergraduate laboratory,” Am. J. Phys. 70, 903-910 (2002). [CrossRef]
  3. Y. Nambu, K. Usami, Y. Tsuda, K. Matsumoto, and K. Nakamura, “Generation of polarization-entangled photon pairs in a cascade of two type-I crystals pumped by femtosecond laser pulses,” Phys. Rev. A 66, 033816 (2002) [CrossRef]
  4. M.G. A.Paris and J.Rehacek, eds., “Quantum state estimation,” Lect. Notes Phys. 649, 1-4 (2004).
  5. G. M. D'Ariano, L. Maccone, and M. G. A. Paris, “Quorum of observables for universal quantum estimation,” J. Phys. A 34, 93-104 (2001). [CrossRef]
  6. K. Banaszek, G. M. D'Ariano, M. G. A. Paris, and M. F. Sacchi, “Maximum-likelihood estimation of the density matrix,” Phys. Rev. A 61, 010304 (2000). [CrossRef]
  7. D. F. V. James, P. G. Kwiat, W. J. Munro, and A. G. White, “Measurement of qubits,” Phys. Rev. A 64, 052312 (2001). [CrossRef]
  8. A. Gogo, W. D. Snyder, and M. Beck, “Comparing quantum and classical correlations in a quantum eraser,” Phys. Rev. A 71, 052103 (2005). [CrossRef]
  9. M. H. Rubin, D. N. Klyshko, Y. H. Shih, and A. V. Sergienko, “Theory of two-photon entanglement in type-II optical parametric down-conversion,” Phys. Rev. A 50, 5122-5133(1994). [CrossRef] [PubMed]
  10. C. K. Hong and L. Mandel, “Theory of parametric frequency down conversion of light,” Phys. Rev. A 31, 2409-2418 (1985). [CrossRef] [PubMed]
  11. G. Brida, M. Chekhova, M. Genovese, and L. Krivitsky, “Generation of different bell state within spontaneous parametric down-conversion phase-matching bandwidth,” Phys. Rev. A 76, 053807 (2007) [CrossRef]
  12. G. Brida, M. V. Chekhova, M. Genovese, and L. A. Krivitsky, “Two-photon entanglement generation: different Bell states within the linewidth of phase-matching,” Opt. Express 15, 10182-10188 (2007) [CrossRef] [PubMed]
  13. A. V. Smith, SNLO nonlinear optics software, Sandia National Laboratories, http://www.sandia.gov/imrl/X1118/xxtal.htm.
  14. A. Yariv and P. Yeh, Optical Waves in Crystals (Wiley, 2003), pp. 69-120.
  15. A. Joobeur, B. E. A. Saleh, T. S. Larchuk, and M. C. Teich, “Coherence properties of entangled light beams generated by parametric down-conversion: theory and experiment,” Phys. Rev. A 53, 4360-4371 (1996) [CrossRef] [PubMed]
  16. K. Blushs and M. Auzinsh, “Validity of rate equations for Zeeman coherences for analysis of nonlinear interaction of atoms with broadband laser radiation,” Phys. Rev. A 69, 063806 (2004). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1 Fig. 2 Fig. 3
Fig. 4

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited