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http://dx.doi.org/10.3807/KJOP.2011.22.6.276

Quantum Interference Experiments with Frequency Entangled Photon Pairs at 1.5 ㎛ Telecommunication Band  

Kim, Heon-Oh (Department of Physics & Basic Science Research Institute, University of Ulsan)
Kim, Yong-Soo (Department of Physics & Basic Science Research Institute, University of Ulsan)
Youn, Chun-Ju (The Convergence Components & Materials Research Laboratory, Electronics and Telecommunication Research Institute)
Cho, Seok-Beom (Quantum Technology Lab., Emerging Technology R&D Center, SK Telecom)
Publication Information
Korean Journal of Optics and Photonics / v.22, no.6, 2011 , pp. 276-282 More about this Journal
Abstract
We performed experiments on Hong-Ou-Mandel type two-photon interference with frequency entangled photon pairs at 1.5 ${\mu}m$ telecommunication band generated through femtosecond pulsed spontaneous parametric down-conversion. Two different angular frequencies ${\omega}_1$ and ${\omega}_2$ were selected using CWDM(coarse wavelength division multiplexing) filters at the output ports of the interferometer. The coincidence counting rates were measured with varying path-length difference between the two interferometer arms to observe the two-photon interference patterns of spatial beating. The obtained visibilities in the net coincidence were close to the theoretical limit of 100%.
Keywords
Spontaneous parametric down-conversion; 1.5 ${\mu}m$ telecommunication band; Frequency entangled state; Hong-Ou-Mandel interference;
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