skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Integrable optical-fiber source of polarization-entangled photon pairs in the telecom band

Abstract

We demonstrate an optical-fiber-based source of polarization-entangled photon pairs with improved quality and efficiency, which has been integrated with off-the-shelf telecom components and is, therefore, well suited for quantum communication applications in the 1550-nm telecom band. Polarization entanglement is produced by simultaneously pumping a loop of standard dispersion-shifted fiber with two orthogonally polarized pump pulses, one propagating in the clockwise and the other in the counterclockwise direction. We characterize this source by investigating two-photon interference between the generated signal-idler photon pairs under various conditions. The experimental parameters are carefully optimized to maximize the generated photon-pair correlation and to minimize contamination of the entangled photon pairs from extraneously scattered background photons that are produced by the pump pulses for two reasons: (i) spontaneous Raman scattering causes uncorrelated photons to be emitted in the signal and idler bands and (ii) broadening of the pump-pulse spectrum due to self-phase modulation causes pump photons to leak into the signal and idler bands. We obtain two-photon interference with visibility >90% without subtracting counts caused by the background photons (only dark counts of the detectors are subtracted), when the mean photon number in the signal (idler) channel is about 0.02/pulse, while no interference is observed inmore » direct detection of either the signal or idler photons.« less

Authors:
; ; ; ; ;  [1]
  1. Center for Photonic Communication and Computing, EECS Department, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3118 (United States)
Publication Date:
OSTI Identifier:
20787218
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 73; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.73.052301; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; CORRELATIONS; DATA TRANSMISSION; EFFICIENCY; INFORMATION THEORY; INTERFERENCE; MODULATION; OPTICAL FIBERS; OPTICS; PHOTONS; POLARIZATION; PULSES; QUANTUM ENTANGLEMENT; RAMAN EFFECT; RAMAN SPECTRA; SIGNALS

Citation Formats

Xiaoying, Li, Chuang, Liang, Fook Lee, Kim, Chen, Jun, Voss, Paul L, and Kumar, Prem. Integrable optical-fiber source of polarization-entangled photon pairs in the telecom band. United States: N. p., 2006. Web. doi:10.1103/PHYSREVA.73.0.
Xiaoying, Li, Chuang, Liang, Fook Lee, Kim, Chen, Jun, Voss, Paul L, & Kumar, Prem. Integrable optical-fiber source of polarization-entangled photon pairs in the telecom band. United States. https://doi.org/10.1103/PHYSREVA.73.0
Xiaoying, Li, Chuang, Liang, Fook Lee, Kim, Chen, Jun, Voss, Paul L, and Kumar, Prem. Mon . "Integrable optical-fiber source of polarization-entangled photon pairs in the telecom band". United States. https://doi.org/10.1103/PHYSREVA.73.0.
@article{osti_20787218,
title = {Integrable optical-fiber source of polarization-entangled photon pairs in the telecom band},
author = {Xiaoying, Li and Chuang, Liang and Fook Lee, Kim and Chen, Jun and Voss, Paul L and Kumar, Prem},
abstractNote = {We demonstrate an optical-fiber-based source of polarization-entangled photon pairs with improved quality and efficiency, which has been integrated with off-the-shelf telecom components and is, therefore, well suited for quantum communication applications in the 1550-nm telecom band. Polarization entanglement is produced by simultaneously pumping a loop of standard dispersion-shifted fiber with two orthogonally polarized pump pulses, one propagating in the clockwise and the other in the counterclockwise direction. We characterize this source by investigating two-photon interference between the generated signal-idler photon pairs under various conditions. The experimental parameters are carefully optimized to maximize the generated photon-pair correlation and to minimize contamination of the entangled photon pairs from extraneously scattered background photons that are produced by the pump pulses for two reasons: (i) spontaneous Raman scattering causes uncorrelated photons to be emitted in the signal and idler bands and (ii) broadening of the pump-pulse spectrum due to self-phase modulation causes pump photons to leak into the signal and idler bands. We obtain two-photon interference with visibility >90% without subtracting counts caused by the background photons (only dark counts of the detectors are subtracted), when the mean photon number in the signal (idler) channel is about 0.02/pulse, while no interference is observed in direct detection of either the signal or idler photons.},
doi = {10.1103/PHYSREVA.73.0},
url = {https://www.osti.gov/biblio/20787218}, journal = {Physical Review. A},
issn = {1050-2947},
number = 5,
volume = 73,
place = {United States},
year = {2006},
month = {5}
}