@inproceedings{10296e91908a4570abd90a0d8c99333a,
title = "Experimental implementation of quantum entanglement and hyperentanglement with a fiber-based two-photon source",
abstract = "We describe the generation of entangled and hyperentangled photon pairs using a microstructure-fiber Sagnac interferometer, which is formed by a polarizing beam splitter and a highly nonlinear microstructure fiber twisted by 90° from end to end. This interferometer allows two identical four-wave mixing processes to occur on the same fiber principal axis, ensuring perfect spatial and temporal mode matching of the two four-wave mixing outputs on the polarizing beam splitter to create entanglement over the entire four-wave mixing phase-matching spectral range. With an average pump power of 220 μW, we measure a two-photon coincidence rate of 1 kHz with Δλ = 0.9 nm. Two-photon interference visibilities exceed 91% for polarization-entangled photon pairs generated from this source, and are > 84% for both time-bin and polarization degrees of freedom for hyperentangled photons, all without subtracting accidental coincidences.",
keywords = "Entanglement, Four-wave mixing, Hyperentanglement, Microstructure fiber, Sagnac interferometer",
author = "Jun Chen and Eisaman, {Matthew D.} and Elizabeth Goldschmidt and Jingyun Fan and Alan Migdall",
year = "2008",
month = nov,
day = "12",
doi = "10.1117/12.794782",
language = "English (US)",
isbn = "9780819473127",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Quantum Communications and Quantum Imaging VI",
note = "Quantum Communications and Quantum Imaging VI ; Conference date: 12-08-2008 Through 14-08-2008",
}