scholarly journals Photon-counting optical coherence-domain reflectometry using superconducting single-photon detectors

2008 ◽  
Vol 16 (22) ◽  
pp. 18118 ◽  
Author(s):  
Nishant Mohan ◽  
Olga Minaeva ◽  
Gregory N. Gol’tsman ◽  
Magued B. Nasr ◽  
Bahaa E. Saleh ◽  
...  
Keyword(s):  
Single Photon ◽  
Photon Counting ◽  
Optical Coherence ◽  
Photon Detectors ◽  
Single Photon Detectors

scholarly journals Photon counting statistics with imperfect detectors

2021 ◽  
Vol 2086 (1) ◽  
pp. 012096
Author(s):  
Aleksei Reutov ◽  
Denis Sych
Keyword(s):  
Continuous Wave ◽  
Single Photon ◽  
Functional Dependence ◽  
Photon Counting ◽  
Light Sources ◽  
Photon Detectors ◽  
Quantum Properties ◽  
Single Photon Detectors ◽  
The Mean ◽  
Counting Statistics

Abstract Measurement of photon statistics is an important tool for the verification of quantum properties of light. Due to the various imperfections of real single photon detectors, the observed statistics of photon counts deviates from the underlying statistics of photons. Here we analyze statistical properties of coherent states, and investigate a connection between Poissonian distribution of photons and sub-Poissonian distribution of photon counts due to the detector dead-time corrections. We derive a functional dependence between the mean number of photons and the mean number of photon counts, as well as connection between higher-order statistical moments, for the pulsed or continuous wave coherent light sources, and confirm the results by numerical simulations.

Time-correlated single-photon counting with superconducting single-photon detectors

2006 ◽  
Author(s):  
Martin J. Stevens ◽  
Robert H. Hadfield ◽  
Robert E. Schwall ◽  
Sae Woo Nam ◽  
Richard P. Mirin
Keyword(s):  
Single Photon ◽  
Photon Counting ◽  
Photon Detectors ◽  
Single Photon Counting ◽  
Single Photon Detectors

scholarly journals A study to develop a robust method for measuring the detection efficiency of free-running InGaAs/InP single-photon detectors

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
M. López ◽  
A. Meda ◽  
G. Porrovecchio ◽  
R. A. Starkwood ◽  
M. Genovese ◽  
...  
Keyword(s):  
Detection Efficiency ◽  
Single Photon ◽  
Photon Number ◽  
Photon Counting ◽  
Photon Detectors ◽  
Single Photon Detectors ◽  
Free Running ◽  
Photon Counting Detectors ◽  
Single Laboratory ◽  
Measurement Approach

AbstractThe challenges faced in a comparison of measuring the detection efficiency of free-running InGaAs/InP single-photon avalanche detectors (InGaAs/InP SPAD) were studied by four European National Metrology Institutes (NMIs) meeting at a single laboratory. The main purpose of this study is to develop a trustable measurement technique and to provide a snapshot of the methods used by the four NMIs for measuring such photon-counting detectors at telecom wavelengths in order to establish proper procedures for characterising such devices. The detection efficiency measurements were performed using different experimental setups and reference standards with independent traceability chains at the wavelength of 1550 nm. A dedicated model to correct the dead time and dark count effects on the SPAD’s free-running counting process was developed, allowing the correct value of the photon rate impinging on the detector to be recovered from simple ratemeter measurements. The detection efficiency was measured for mean photon number per pulse between 0.01 and 2.4, corresponding to photon rates between approximately 1100 photon/s and 193,000 photon/s, respectively. We found that the measured values reported by the participants are all consistent within the stated uncertainties, proving the consistency of the measurement approach developed.

Ti/Au TES AS SUPERCONDUCTING DETECTOR FOR QUANTUM TECHNOLOGIES

2011 ◽  
Vol 09 (supp01) ◽  
pp. 405-413 ◽  
Author(s):  
L. LOLLI ◽  
G. BRIDA ◽  
I. P. DEGIOVANNI ◽  
M. GRAMEGNA ◽  
E. MONTICONE ◽  
...  
Keyword(s):  
Single Photon ◽  
Transition Edge Sensor ◽  
Photon Counting ◽  
Single Photons ◽  
Photon Detectors ◽  
Preliminary Measurement ◽  
Transition Edge ◽  
Visible Wavelength Range ◽  
Single Photon Detectors ◽  
Down Conversion

Single photon detectors are fundamental tools for quantum metrology, e.g. to calibrate both detectors and sources, as for quantum information. One of the most promising detectors able to resolve single photons is the transition-edge sensor (TES). We report our last results obtained with Ti/Au TES deposited on SiN substrate. Photon counting measurements, obtained by using pulsed sources, in the NIR-visible wavelength range, show the ability to resolve up to fourteen photons with an energy resolution of 0.44 eV at 690 nm (1.80 eV) and 0.38 eV at 1310 nm (0.95 eV), with a good linearity. A preliminary measurement obtained by using a parametric down conversion (PDC) heralded single photon source, at 812 nm (1.53 eV), is also reported.

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