Three-color Sagnac source of polarization-entangled photon pairs
| Autor: | Hentschel, M., Hübel, H., Poppe, A., Zeilinger, A. |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Optics Express, Vol. 17, Issue 25, pp. 23153-23159 (2009) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1364/OE.17.023153 |
| Popis: | We demonstrate a compact and stable source of polarization-entangled pairs of photons, one at 810 nm wavelength for high detection efficiency and the other at 1550 nm for long-distance fiber communication networks. Due to a novel Sagnac-based design of the interferometer no active stabilization is needed. Using only one 30 mm ppKTP bulk crystal the source produces photons with a spectral brightness of 1.13x10^6 pairs/s/mW/THz with an entanglement fidelity of 98.2%. Both photons are single-mode fiber coupled and ready to be used in quantum key distribution (QKD) or transmission of photonic quantum states over large distances. Comment: 7 pages, 4 figures |
| Databáze: | arXiv |
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