scholarly journals Quantum image distillation

2019 ◽  
Vol 5 (10) ◽  
pp. eaax0307 ◽  
Author(s):  
Hugo Defienne ◽  
Matthew Reichert ◽  
Jason W. Fleischer ◽  
Daniele Faccio
Keyword(s):  
Single Photon ◽  
Signal To Noise Ratio ◽  
Photon Counting ◽  
Measured Data ◽  
Quantum States ◽  
Signal To Noise ◽  
Quantum Imaging ◽  
Intensity Correlation ◽  
Quantum Image ◽  
Single Photon Counting

Imaging with quantum states of light promises advantages over classical approaches in terms of resolution, signal-to-noise ratio, and sensitivity. However, quantum detectors are particularly sensitive sources of classical noise that can reduce or cancel any quantum advantage in the final result. Without operating in the single-photon counting regime, we experimentally demonstrate distillation of a quantum image from measured data composed of a superposition of both quantum and classical light. We measure the image of an object formed under quantum illumination (correlated photons) that is mixed with another image produced by classical light (uncorrelated photons) with the same spectrum and polarization, and we demonstrate near-perfect separation of the two superimposed images by intensity correlation measurements. This work provides a method to mix and distinguish information carried by quantum and classical light, which may be useful for quantum imaging, communications, and security.

scholarly journals Three-Dimensional Imaging via Time-Correlated Single-Photon Counting

2020 ◽  
Vol 10 (6) ◽  
pp. 1930
Author(s):  
Chengkun Fu ◽  
Huaibin Zheng ◽  
Gao Wang ◽  
Yu Zhou ◽  
Hui Chen ◽  
...  
Keyword(s):  
3D Imaging ◽  
Single Photon ◽  
Signal To Noise Ratio ◽  
Photon Counting ◽  
Three Dimensional ◽  
Similarity Index ◽  
Signal To Noise ◽  
Single Photon Counting ◽  
Imaging Results ◽  
Noise Ratio

Three-dimensional (3D) imaging under the condition of weak light and low signal-to-noise ratio is a challenging task. In this paper, a 3D imaging scheme based on time-correlated single-photon counting technology is proposed and demonstrated. The 3D imaging scheme, which is composed of a pulsed laser, a scanning mirror, single-photon detectors, and a time-correlated single-photon counting module, employs time-correlated single-photon counting technology for 3D LiDAR (Light Detection and Ranging). Aided by the range-gated technology, experiments show that the proposed scheme can image the object when the signal-to-noise ratio is decreased to −13 dB and improve the structural similarity index of imaging results by 10 times. Then we prove the proposed scheme can image the object in three dimensions with a lateral imaging resolution of 512 × 512 and an axial resolution of 4.2 mm in 6.7 s. At last, a high-resolution 3D reconstruction of an object is also achieved by using the photometric stereo algorithm.

Single Photon Counting Discrimination Voltage Software

2017 ◽  
Vol 872 ◽  
pp. 354-359
Author(s):  
Long Hu Deng ◽  
Wei Feng Liu ◽  
Yi Jia Lu ◽  
Jia Cheng
Keyword(s):  
Single Photon ◽  
Selection Process ◽  
Signal To Noise Ratio ◽  
Photon Counting ◽  
High Signal ◽  
Signal To Noise ◽  
Single Photon Counting ◽  
Counting Technique ◽  
Noise Ratio ◽  
Analysis System

Because the output signals of photon detectors are scattered under weak light, the single photon counting method uses pulse discrimination technique and digital counting technique to identify and count weak signals. Compared with analog recording technique, the single photon counting technique has the advantages of high signal-to-noise ratio and good anti drift performance. Discrimination voltage is an important part of single photon counting, which will greatly affect the signal to noise ratio (SNR). The selected process of discrimination voltage is very complicated, especially the number of photomultiplier tube spectral analysis system [1], discrimination voltage selection process more time-consuming. This paper presents a software for automatically searching voltage discrimination. The software can automatically measure the discrimination voltage of a plurality of photomultiplier tubes, greatly improve the efficiency and accuracy of screening voltage selection, and verify the effectiveness of the screening voltage software by calculating the signal-to-noise ratio.

scholarly journals Development of low-energy X-ray detectors using LGAD sensors

2019 ◽  
Vol 26 (4) ◽  
pp. 1226-1237 ◽  
Author(s):  
Marie Andrä ◽  
Jiaguo Zhang ◽  
Anna Bergamaschi ◽  
Rebecca Barten ◽  
Camelia Borca ◽  
...  
Keyword(s):  
Energy Range ◽  
Single Photon ◽  
Signal To Noise Ratio ◽  
Photon Counting ◽  
Low Energy ◽  
X Rays ◽  
Single Photon Counting ◽  
X Ray ◽  
Internal Gain ◽  
Silicon Sensors

Recent advances in segmented low-gain avalanche detectors (LGADs) make them promising for the position-sensitive detection of low-energy X-ray photons thanks to their internal gain. LGAD microstrip sensors fabricated by Fondazione Bruno Kessler have been investigated using X-rays with both charge-integrating and single-photon-counting readout chips developed at the Paul Scherrer Institut. In this work it is shown that the charge multiplication occurring in the sensor allows the detection of X-rays with improved signal-to-noise ratio in comparison with standard silicon sensors. The application in the tender X-ray energy range is demonstrated by the detection of the sulfur K α and K β lines (2.3 and 2.46 keV) in an energy-dispersive fluorescence spectrometer at the Swiss Light Source. Although further improvements in the segmentation and in the quantum efficiency at low energy are still necessary, this work paves the way for the development of single-photon-counting detectors in the soft X-ray energy range.

TOWARD REAL NOON-STATE SOURCES

2009 ◽  
Vol 07 (supp01) ◽  
pp. 263-278
Author(s):  
MILENA D'ANGELO ◽  
AUGUSTO GARUCCIO ◽  
VINCENZO TAMMA
Keyword(s):  
Single Photon ◽  
Signal To Noise Ratio ◽  
Surprising Result ◽  
Single Photon Detection ◽  
Main Ingredient ◽  
Signal To Noise ◽  
Quantum Imaging ◽  
Photon Detection ◽  
Imaging Protocols ◽  
Noon State

Path-entangled N-photon systems described by NOON states are the main ingredient of many quantum information and quantum imaging protocols. Our analysis aims to lead the way toward the implementation of both NOON-state sources and their applications. To this end, we study the functionality of "real" NOON-state sources by quantifying the effect real experimental apparatuses have on the actual generation of the desired NOON state. In particular, since the conditional generation of NOON states strongly relies on photon counters, we evaluate the dependence of both the reliability and the signal-to-noise ratio of "real" NOON-state sources on detection losses. We find a surprising result: NOON-state sources relying on nondetection are much more reliable than NOON-state sources relying on single-photon detection. Also the comparison of the resources required to implement these two protocols comes out to be in favor of NOON-state sources based on nondetection. A scheme to improve the performances of "real" NOON-state sources based on single-photon detection is also proposed and analyzed.

scholarly journals MYTHEN Detector – Perspectives in Residual Stress Measurements

2014 ◽  
Vol 996 ◽  
pp. 203-208 ◽  
Author(s):  
Dubravka Sisak Jung ◽  
Lasse Suominen ◽  
Jari Parantainen ◽  
Christoph Hoermann
Keyword(s):  
Residual Stress ◽  
Dynamic Range ◽  
Single Photon ◽  
Signal To Noise Ratio ◽  
Photon Counting ◽  
High Dynamic Range ◽  
Single Photon Counting ◽  
Stress Measurements ◽  
Technical Details ◽  
Radiation Hard

MYTHEN is a single-photon-counting strip detector. Its main features are high spatial resolution, zero noise, fluorescence suppression, fast readout, high dynamic range, radiation-hard and maintenance-free design. Perspectives of such a detector in residual stress measurements involve: (i) Measurements of absorbing/thick materials (ii) Well resolved peaks (iii) excellent signal-to-noise ratio (iv) Analysis of alloys (v) Fast data collection (vi) Accurate low content retained austenite measurements (vii) in situ measurements and mapping (viii) infinite life cycle. Technical details and application in synchrotron and laboratory diffractometers will be presented.

Single Point PICA Probing with an Avalanche Photo-Diode

2001 ◽  
Author(s):  
Mike Bruce ◽  
Rama R. Goruganthu ◽  
Shawn McBride ◽  
David Bethke ◽  
J.M. Chin
Keyword(s):  
Single Photon ◽  
Single Point ◽  
Photon Counting ◽  
Ring Oscillator ◽  
Time Resolved ◽  
Single Photon Counting ◽  
Photo Diode ◽  
Avalanche Photo Diode ◽  
Photo Multiplier Tube ◽  
Channel Plate

Abstract For time resolved hot carrier emission from the backside, an alternate approach is demonstrated termed single point PICA. The single point approach records time resolved emission from an individual transistor using time-correlated-single-photon counting and an avalanche photo-diode. The avalanche photo-diode has a much higher quantum efficiency than micro-channel plate photo-multiplier tube based imaging cameras typically used in earlier approaches. The basic system is described and demonstrated from the backside on a ring oscillator circuit.

scholarly journals UVscope and its application aboard the ASTRI-Horn telescope

2021 ◽  
Author(s):  
Maria Concetta Maccarone ◽  
Giovanni La Rosa ◽  
Osvaldo Catalano ◽  
Salvo Giarrusso ◽  
Alberto Segreto ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Single Photon ◽  
Photon Counting ◽  
Light Flux ◽  
Cosmic Ray ◽  
High Energy ◽  
Wide Field ◽  
High Energy Astrophysics ◽  
Single Photon Counting ◽  
Photon Counting Mode

AbstractUVscope is an instrument, based on a multi-pixel photon detector, developed to support experimental activities for high-energy astrophysics and cosmic ray research. The instrument, working in single photon counting mode, is designed to directly measure light flux in the wavelengths range 300-650 nm. The instrument can be used in a wide field of applications where the knowledge of the nocturnal environmental luminosity is required. Currently, one UVscope instrument is allocated onto the external structure of the ASTRI-Horn Cherenkov telescope devoted to the gamma-ray astronomy at very high energies. Being co-aligned with the ASTRI-Horn camera axis, UVscope can measure the diffuse emission of the night sky background simultaneously with the ASTRI-Horn camera, without any interference with the main telescope data taking procedures. UVscope is properly calibrated and it is used as an independent reference instrument for test and diagnostic of the novel ASTRI-Horn telescope.

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