Zhi-Yuan Zhou, Yun-Kun Jiang, Dong-Sheng Ding, Bao-Sen Shi, Guang-Can Guo
In this work, a broadband continuously-tunable, high polarization-entangled photon-pair source covering the C+L telecom bands is prepared. More than 60 nm turning band of down-converted photons is achieved experimentally, and the tunable range over 100 nm is expected if a better temperature controller and a single photon detector are used. The high raw (net) visibility in different measurement basis, enough to violate the Bell-type inequality, imply a good entanglement of the source at different pump wavelengths. Our source is very promising to using WDM system to burst the transmission capacity of a single communication channel in the field of quantum communication.
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http://arxiv.org/abs/1211.4419
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