| Author(s): |
Jingyun Fan; M D. Eisaman; Alan L. Migdall; |
| Title: |
Quantum state tomography of a fiber-based source of polarization-entangled photon pairs |
| Published: |
December 20, 2007 |
| Abstract: |
We report an experimental demonstration of a bright highfidelity single-mode-optical-fiber source of polarization-entangled photon pairs. The source takes advantage of single-mode fiber optics, highly nonlinear microstructure fiber, judicious phase-matching, and the inherent stability provided by a Sagnac interferometer. With a modest average pump power (300 μW), we create all four Bell states with a detected two-photon coincidence rate of 7 kHz per bandwidth of 0.9 nm, in a spectral range of more than 20 nm. To characterize the purity of the states produced by this source, we use quantum-state tomography to reconstruct the corresponding density matrices, with fidelities of 95 % or more for each Bell state. |
| Citation: |
Optics Express |
| Volume: |
15 |
| Pages: |
pp. 18339 - 18344 |
| Keywords: |
accidental;bell state;coincidene;four-wave mixing;Raman scattering;Sagnac interferometer;tomography |
| Research Areas: |
Entanglement, Quantum Optics, Quantum Information, Single Photon Detectors, Entangled Photons, Quantum Devices, Single Photon Sources, Squeezing, Correlated Photon Radiometry, Quantum Information Technology |
| PDF version: |
 Click here to retrieve PDF version of paper (349KB) |
