We demonstrate broadband polarization-entangled photon pair generation in a poled fiber phase matched for Type II downconversion in the 1.5 μm telecom band. Even with signal–idler separation greater than 100 nm, we observe fringe visibilities greater than 97% and tangle greater than 0.8. A Hong–Ou–Mandel interference experiment is also used to experimentally confirm the broadband nature of the entanglement.
© 2013 Optical Society of America
Original Manuscript: July 29, 2013
Revised Manuscript: September 17, 2013
Manuscript Accepted: September 17, 2013
Published: October 25, 2013
E. Y. Zhu, Z. Tang, L. Qian, L. G. Helt, M. Liscidini, J. E. Sipe, C. Corbari, A. Canagasabey, M. Ibsen, and P. G. Kazansky, "Poled-fiber source of broadband polarization-entangled photon pairs," Opt. Lett. 38, 4397-4400 (2013)