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Title: Heralding efficiency and correlated-mode coupling of near-IR fiber-coupled photon pairs

Journal Article · · Physical Review A - Atomic, Molecular, and Optical Physics
 [1];  [2];  [3];  [2];  [4];  [2];  [2];  [2];  [3]
  1. Massachusetts Inst. of Technology (MIT), Lexington, MA (United States). Lincoln Laboratory; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Research Laboratory of Electronics
  2. Massachusetts Inst. of Technology (MIT), Lexington, MA (United States). Lincoln Laboratory
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Research Laboratory of Electronics
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

We report on a systematic experimental study of heralding efficiency and generation rate of telecom-band infrared photon pairs generated by spontaneous parametric down-conversion and coupled to single mode optical fibers. We define the correlated-mode coupling efficiency--an inherent source efficiency--and explain its relation to heralding efficiency. For our experiment, we developed a reconfigurable computer controlled pump-beam and collection-mode optical apparatus which we used to measure the generation rate and correlated-mode coupling efficiency. The use of low-noise, high-efficiency superconducting-nanowire single-photon-detectors in this setup allowed us to explore focus configurations with low overall photon flux. The measured data agree well with theory and we demonstrated a correlated-mode coupling efficiency of 97%±2%, which is the highest efficiency yet achieved for this type of system. These results confirm theoretical treatments and demonstrate that very high overall heralding efficiencies can, in principle, be achieved in quantum optical systems. We expect that these results and techniques will be widely incorporated into future systems that require, or benefit from, a high heralding efficiency.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
ORNL LDRD Director's R&D
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1163588
Journal Information:
Physical Review A - Atomic, Molecular, and Optical Physics, Journal Name: Physical Review A - Atomic, Molecular, and Optical Physics Journal Issue: 4 Vol. 90; ISSN 1050-2947; ISSN PLRAAN
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Entanglement-Enhanced Sensing in a Lossy and Noisy Environment text January 2014
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Randomness extraction from Bell violation with continuous parametric down conversion text January 2018
Device independent quantum random number generation text January 2018
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