Photon-number resolving and distribution verification using a multichannel superconducting nanowire single-photon detection system

Liu, Dengkuan; You, Lixing; He, Yabai; Lv, Cuicui; Chen, Sijing; Zhang, Ling; Wang, Zhen; Xie, Xiaoming

doi:10.1364/josab.31.000816

Cited by 6 publications

(4 citation statements)

References 30 publications

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“…If a single photon detector could resolve photon numbers with high spatial sensitivity, the random bit generation efficiency η R could be further improved. Although such an ideal detector remains technically challenging [21][22][23], its functionality can be demonstrated using a multi-channel SNSPD system [24], as detailed in the next section. We now propose a method for improving the generation efficiency.…”

Section: Trng Methods Based On Single Photon Detectionmentioning

confidence: 99%

Bias-free true random number generation using superconducting nanowire single-photon detectors

He¹,

Zhang²,

Zhou³

et al. 2016

Supercond. Sci. Technol.

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We demonstrate a bias-free true random number generator (TRNG) based on single photon detection using superconducting nanowire single photon detectors (SNSPDs). By comparing the photon detection signals of two consecutive laser pulses and extracting the random bits by the von Neumann correction method, we achieved a random number generation efficiency of 25% (a generation rate of 3.75 Mbit s−1 at a system clock rate of 15 MHz). Using a multi-channel superconducting nanowire single photon detector system with controllable pulse signal amplitudes, we detected the single photons with photon number resolution and positional sensitivity, which could further increase the random number generation efficiency. In a three-channel SNSPD system, the random number bit generation efficiency was improved to 75%, corresponding to a generation rate of 7.5 Mbit s−1 with a 10 MHz system clock rate. All of the generated random numbers successfully passed the statistical test suite.

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Section: Trng Methods Based On Single Photon Detectionmentioning

confidence: 99%

Bias-free true random number generation using superconducting nanowire single-photon detectors

He¹,

Zhang²,

Zhou³

et al. 2016

Supercond. Sci. Technol.

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“…In this paper, we have constructed an SNSPD-based 4PPM bi-directional optical fiber communication system to evaluate the communication performance under very low received optical power conditions. We analyze the phenomena of pulse intensity inconsistency, pulse splitting, and pulse missing, which are characteristic of the SNSPD output probe signals, and compare them with the baseband signals 28 . The experimental findings reveal that the SNSPD-based bidirectional fiber optic communication system can achieve real-time video communication with a Bit Error Rate (BER) in the order of 1×10−5 at an average received optical power level of −75 dBm.…”

Section: Introductionmentioning

confidence: 99%

Performance of a superconducting nanowire single-photon detectors-based bi-directional communication system at ultra-low received optical power

Wang,

Guo,

Jia

et al. 2024

Opt. Eng.

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We study the communication capabilities of a bi-directional real-time communication system that employs superconducting nanowire single-photon detectors (SNSPDs) under ultra low received optical power conditions. Furthermore, we analyze the influence of received optical power jitter on the system's communication performance.To accomplish this, we construct a bi-directional real-time fiber optic communication system based on SNSPDs using the pulse position modulation. We successfully achieve bi-directional real-time video communication even under very low received optical power conditions, maintaining an average received optical power level of −75 dBm. The bit error rates for the uplink and downlink are measured at 2.56 × 10 −5 and 3.08 × 10 −5 , respectively. Additionally, our investigation reveals that the SNSPD can tolerate a jitter range of up to 5 dB in received optical power while ensuring uninterrupted communication. This paper delves into the practical engineering application of a high-sensitivity optical communication system based on SNSPDs, offering novel insights for optimizing their future use in free space optical communication systems.

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“…For the reading of their signal, a power combiner can be used, and this has provided good results for the characterization of pulsed sources. In this case, the number of photons is distinguished according to the height of the voltage pulse which is recorded in correspondence with a light pulse arriving from the source [8], [10]. However, the characterization of a continuous, non-pulsed light source can be more intricate.…”

Section: Introductionmentioning

confidence: 99%

Time Binning Method for Nonpulsed Sources Characterization With a Superconducting Photon Number Resolving Detector

Ercolano,

Bruscino,

Salvoni

et al. 2023

IEEE Trans. Quantum Eng.

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Photon number resolving detectors find space in many fields, such as quantum optics, boson sampling and fluorescence spectroscopy. In particular, the reconstruction of the input photon distribution is essential in quantum communications to detect photon-number-splitting attacks. In this work, we discuss the operation configurations of a photon number resolving detector based on superconducting nanostrips at a wavelength of 1550 nm from a temporal point of view. We set a time binning and acquired the number of recorded pulses per bin by means of a time-to-digital converter. We studied the predictions of two theoretical models and compared them to the experimental data in order to analyse their operation regimes depending on the binwidth and to employ them for the reconstruction of the input photon distribution. We applied this method to a continuous-wave laser source, showing that the former can be used for the characterization of non-pulsed light sources, even with a photon emission rate so low that the dark count rate of a superconducting nanostrip is not negligible. INDEX TERMS Light sources, photodetectors, photon number resolving detectors, superconducting devices, superconducting photodetectorsThis article has been accepted for publication in IEEE Transactions on Quantum Engineering.

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Photon-number resolving and distribution verification using a multichannel superconducting nanowire single-photon detection system

Cited by 6 publications

References 30 publications

Bias-free true random number generation using superconducting nanowire single-photon detectors

Bias-free true random number generation using superconducting nanowire single-photon detectors

Performance of a superconducting nanowire single-photon detectors-based bi-directional communication system at ultra-low received optical power

Time Binning Method for Nonpulsed Sources Characterization With a Superconducting Photon Number Resolving Detector

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