Heralding efficiency and correlated-mode coupling of near-IR fiber-coupled photon pairs
- Massachusetts Inst. of Technology (MIT), Lexington, MA (United States). Lincoln Laboratory; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Research Laboratory of Electronics
- Massachusetts Inst. of Technology (MIT), Lexington, MA (United States). Lincoln Laboratory
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Research Laboratory of Electronics
- 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:
- USDOE Laboratory Directed Research and Development (LDRD) Program
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1163588
- Journal Information:
- Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 90, Issue 4; ISSN 1050-2947
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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