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Proceedings Paper

Near-IR photon number resolving detector design
Author(s): Jan Bogdanski; Elanor H. Huntington
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Paper Abstract

Photon-Number-Resolving-Detection (PNRD) capability is crucial for many Quantum-Information (QI) applications, e.g. for Coherent-State-Quantum-Computing, Linear-Optics-Quantum-Computing. In Quantum-Key-Distribution and Quantum-Secret-Sharing over 1310/1550 nm fiber, two other important, defense and information security related, QI applications, it’s crucial for the information transmission security to guarantee that the information carriers (photons) are single. Thus a PNRD can provide an additional security level against eavesdropping. Currently, there are at least a couple of promising PNRD technologies in the Near-Infrared, but all of them require cryogenic cooling. Thus a compact, portable PNRD, based on commercial Avalanche-Photo-Diodes (APDs), could be a very useful instrument for many QI experiments. For an APD-based PNRD, it is crucial to measure the APD-current in the beginning of the avalanche. Thus an efficient cancellation of the APD capacitive spikes is a necessary condition for the very weak APD current measurement. The detector’s principle is based on two commercial, pair-matched InGaAs/InP APDs, connected in series. It leads to a great cancelation of the capacitive spikes caused by the narrow (300 ps), differential gate-pulses of maximum 4V amplitude assuming that both pulses are perfectly matched in regards to their phases, amplitudes, and shapes. The cancellation scheme could be used for other APD-technologies, e.g. Silicon, extending the detection spectrum from visible to NIR. The design distinguishes itself from other, APD-based, schemes by its scalability feature and its computer controlled cancellation of the capacitive spikes. Furthermore, both APDs could be equally used for the detection purpose, which opens a possibility for the odd-even photon number parity detection.

Paper Details

Date Published: 29 May 2013
PDF: 9 pages
Proc. SPIE 8727, Advanced Photon Counting Techniques VII, 87270I (29 May 2013); doi: 10.1117/12.2014501
Show Author Affiliations
Jan Bogdanski, The Univ. of New South Wales (Australia)
Elanor H. Huntington, The Univ. of New South Wales (Australia)

Published in SPIE Proceedings Vol. 8727:
Advanced Photon Counting Techniques VII
Mark A. Itzler; Joe C. Campbell, Editor(s)

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