Generation of frequency tunable polarization entangled photon pairs

Atsushi Yabushita*, Takayoshi Kobayashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Photon pairs with correlated frequencies from an optical parametric system were generated by a continuous wave pump focused on a type-II nonlinear crystal with polarization entanglement. The polarization entanglement of the frequency resolved photons was measured under several typical configurations. By optimizing a condition, the degree of polarization entanglement was improved substantially. We proposed the application of the system, which can be used as a light source of wavelength division multiplexing quantum key distribution, optimizing the configuration of the photon-pair generation.

Original languageEnglish
Article number063101
JournalJournal of Applied Physics
Issue number6
StatePublished - 23 Mar 2006

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