Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Frontiers in Optics

Generation of Cross-Polarized Degenerate Photon Pairs in Dispersion-Shifted Fiber

Jun Chen, Kim Fook Lee, Chuang Liang, Prem Kumar

Published Jan 1, 2006• 1 citation
Publisher

Abstract

We generate degenerate-frequency, cross-polarized photon pairs for the first time in dispersion-shifted fiber using dual-frequency, orthogonally-polarized pump pulses. A ratio of coincidence to accidental-coincidence counts near 20 is obtained.
DOI
10.1364/fio.2006.ftur4

Related papers

Fiber-based telecom-band degenerate-frequency source of entangled photon pairs

Jun Chen, Kim Fook Lee, Chuang Liang +1 more

We demonstrate the generation of polarization-entangled photon pairs of degenerate frequency for the first time, to the best of our knowledge, in standard optical fiber using a novel dual-pump, counterpropagating configuration. Two-photon interference with >97% visibility is obtained. The purity of the photon source, as characterized by the ratio of coincidence to accidental-coincidence counts, is shown to be as high as 116 under suitable operating conditions.

Optics Letters•Aug 25, 2006•57 citations

Generation of correlated photon pairs in a microstructure fiber

Jingyun Fan, Aristide C. Dogariu, L. J. Wang

We propose and experimentally demonstrate a new method of generating correlated photons in a microstructure fiber by means of a reversed degenerate four-wave-mixing process. Here one photon is annihilated from each of the bichromatic pump pulses to generate a pair of photons at the mean frequency. For a microstructure fiber as short as 1.5 m the measured coincidence counting rate is approximately eight times that of the accidental coincidences with a peak pump power of 0.25 W.

arXiv:quant-ph/0505211•Optics Letters•Jun 15, 2005•73 citations

Generation of near-infrared correlated photon pairs in a long optical nano-fibers

Jin-Hun Kim, Yong Sup Ihn, Heedeuk Shin +1 more

We report the generation of frequency-nondegenerate correlated photon pairs in an 8-cm-long optical nano-fiber. The coincidence-to-accidental ratio exceeding 400 has been achieved at a very low average pump power of 50 µW.

Frontiers in Optics•Jan 1, 2017•1 citation

Generation of high-purity telecom-band entangled photon pairs in dispersion-shifted fiber

Kim Fook Lee, Jun shuo Chen, Chuang Liang +3 more

We study the purity of correlated photon pairs generated in a dispersion-shifted fiber at various temperatures. The ratio of coincidence to accidental-coincidence counts greater than 100 can be obtained as the fiber is cooled to liquid-nitrogen temperature (77 K). We then generate polarization-entangled photon pairs by using a compact counterpropagating scheme. Two-photon interference with visibility >98% and Bell's inequality violation by >8 standard deviations of measurement uncertainty are observed at 77 K, without subtracting the accidental-coincidence counts due to background Raman photons.

Optics Letters•May 25, 2006•107 citations

Fiber-based Degenerate Correlated-Photon Source in the Telecom Band

Jun Chen, Kim Fook Lee, Chuang Liang +1 more

We demonstrate a fiber-based correlated-photon source, wherein the two daughter photons are degenerate in frequency. A coincidence-to-accidental-coincidence ratio >100 is obtained when the fiber is cooled to liquid nitrogen temperature

IEEE/LEOS Summer Topical Meetings•Sep 22, 2006•0 citations

A microstructure fiber two photon source with conjugate laser pumps

Jingyun Fan, Alan L. Migdall, L. J. Lang

We present a systematic experimental study of generating correlated photon pairs using a reversed degenerate four-wave mixing process. By overlapping a pair of parallel- (or cross-) polarized laser pump pulses at conjugate frequencies in a microstructure fiber, parallel- or (cross-) polarized correlated photon pairs are generated at the middle frequency. The generation rate of correlated photons by four-wave mixing with parallel-polarized laser pumps in a 1.8 meter microstructure fiber is comparable or higher than that of a parametric down conversion process in a bulk-crystal at similar pump power levels.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Aug 18, 2005•0 citations
We study the purity of correlated photon pairs generated in a dispersion-shifted fiber at various temperatures. The ratio of coincidence to accidental-coincidence counts greater than 100 can be obtained as the fiber is cooled to liquid-nitrogen temperature (77 K). We then generate polarization-entangled photon pairs by using a compact counterpropagating scheme. Two-photon interference with visibility >98% and Bell's inequality violation by >8 standard deviations of measurement uncertainty are observed at 77 K, without subtracting the accidental-coincidence counts due to background Raman photons.
We present a systematic experimental study of generating correlated photon pairs using a reversed degenerate four-wave mixing process. By overlapping a pair of parallel- (or cross-) polarized laser pump pulses at conjugate frequencies in a microstructure fiber, parallel- or (cross-) polarized correlated photon pairs are generated at the middle frequency. The generation rate of correlated photons by four-wave mixing with parallel-polarized laser pumps in a 1.8 meter microstructure fiber is comparable or higher than that of a parametric down conversion process in a bulk-crystal at similar pump power levels.