scholarly journals Counting of Hong-Ou-Mandel Bunched Optical Photons Using a Fast Pixel Camera

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3475
Author(s):  
Andrei Nomerotski ◽  
Michael Keach ◽  
Paul Stankus ◽  
Peter Svihra ◽  
Stephen Vintskevich
Keyword(s):  
Spatial Resolution ◽  
Time Resolution ◽  
Interference Effect ◽  
Beam Splitter ◽  
Good Time ◽  
Spatial Mode ◽  
Parametric Down Conversion ◽  
Optical Photons ◽  
Down Conversion ◽  
Good Time Resolution

The uses of a silicon-pixel camera with very good time resolution (∼nanosecond) for detecting multiple, bunched optical photons is explored. We present characteristics of the camera and describe experiments proving its counting capabilities. We use a spontaneous parametric down-conversion source to generate correlated photon pairs, and exploit the Hong-Ou-Mandel (HOM) interference effect in a fiber-coupled beam splitter to bunch the pair onto the same output fiber. It is shown that the time and spatial resolution of the camera enables independent detection of two photons emerging simultaneously from a single spatial mode.

scholarly journals WAPP — Wideband Arecibo Pulsar Processor

2000 ◽  
Vol 177 ◽  
pp. 275-276 ◽  
Author(s):  
A. Dowd ◽  
W. Sisk ◽  
J. Hagen
Keyword(s):  
Time Resolution ◽  
Good Time ◽  
Key Features ◽  
Arecibo Observatory ◽  
Good Time Resolution

AbstractThe WAPP is a new Pulsar Processor for Arecibo Observatory. Key features are wideband operation (100 MHz) and good time resolution (16 microseconds).

scholarly journals Partial Bell-State Analysis with Parametric down Conversion in the Wigner Function Formalism

2010 ◽  
Vol 2010 ◽  
pp. 1-11 ◽  
Author(s):  
A. Casado ◽  
S. Guerra ◽  
J. Plácido
Keyword(s):  
Wigner Function ◽  
Beam Splitter ◽  
Bell State ◽  
Function Formalism ◽  
State Measurement ◽  
Parametric Down Conversion ◽  
Correlation Properties ◽  
Light Beams ◽  
Down Conversion ◽  
State Analysis

We apply the Wigner function formalism to partial Bell-state analysis using polarization entanglement produced in parametric down conversion. Two-photon statistics at a beam-splitter are reproduced by a wave-like description with zeropoint fluctuations of the electromagnetic field. In particular, the fermionic behaviour of two photons in the singlet state is explained from the invariance on the correlation properties of two light beams going through a balanced beam-splitter. Moreover, we show that a Bell-state measurement introduces some fundamental noise at the idle channels of the analyzers. As a consequence, the consideration of more independent sets of vacuum modes entering the crystal appears as a need for a complete Bell-state analysis.

scholarly journals Control of the shape of the spatial mode function of photons generated in noncollinear spontaneous parametric down-conversion

2005 ◽  
Vol 72 (6) ◽  
Author(s):  
Gabriel Molina-Terriza ◽  
Stefano Minardi ◽  
Yana Deyanova ◽  
Clara I. Osorio ◽  
Martin Hendrych ◽  
...  
Keyword(s):  
Spatial Mode ◽  
Mode Function ◽  
Parametric Down Conversion ◽  
Down Conversion

The Time-Frequency Resolution of Short Time Fourier Transform Based on Multi-Window Functions

2011 ◽  
Vol 214 ◽  
pp. 122-127 ◽  
Author(s):  
Li Hua Wang ◽  
Qi Dong Zhang ◽  
Yong Hong Zhang ◽  
Kai Zhang
Keyword(s):  
Fourier Transform ◽  
Time Resolution ◽  
High Performance ◽  
Frequency Resolution ◽  
Good Time ◽  
Short Time Fourier Transform ◽  
Time Frequency ◽  
Window Functions ◽  
Short Time ◽  
Good Time Resolution

The short-time Fourier transform has the disadvantage that is does not localize time and frequency phenomena very well. Instead the time-frequency information is scattered which depends on the length of the window. It is not possible to have arbitrarily good time resolution simultaneously with good frequency resolution. In this paper, a new method that uses the short-time Fourier transform based on multi-window functions to enhance time-frequency resolution of signals has been proposed. Simulation and experimental results present the high performance of the proposed method.

scholarly journals Simulation of a Fast Timing Micro-Pattern Gaseous Detector for TOF-PET and future accelerators

2019 ◽  
Vol 214 ◽  
pp. 02033
Author(s):  
Raffaella Radogna ◽  
Piet Verwilligen ◽  
Marcello Maggi
Keyword(s):  
Spatial Resolution ◽  
Time Resolution ◽  
Rate Capability ◽  
High Rate ◽  
Good Time ◽  
High Rate Capability ◽  
Detection Scheme ◽  
Fast Timing ◽  
Micro Pattern ◽  
Tof Pet

Simulation is a powerful tool for designing new detectors and guide the construction of new prototypes. Advances in photolithography and micro-electronics led to the development of a new family of devices named Micro-Pattern Gas Detectors (MPGDs) [1], with main features: flexible geometry; high rate capability (> MHz/cm2); excellent spatial resolution ( 100µ m); good time resolution (5-10 ns); and reduced radiation length. A new detector layout, named Fast Timing MPGD (FTM), has been recently proposed [2] that would combine both the high spatial resolution and high rate capability of the MPGDs, while improving the time resolution with nearly two orders of magnitude to ~100ps. However charged particle timing with gaseous detector time resolution below 100 ps has been established with another detection scheme [3], this approach might not be able to sustain high particle rates. This contribution investigates the use of the FTM technology for an innovative TOF-PET imaging detector and emphases the importance of full detector simulation to guide the design of the detector geometry and performance.

CHINESE STAR-TOF MRPC PRODUCTION AND QA TESTING

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2541-2548 ◽  
Author(s):  
◽  
YI WANG ◽  
XIAOBIN WANG
Keyword(s):  
Time Resolution ◽  
Detection Efficiency ◽  
Science And Technology ◽  
Time Of Flight ◽  
Good Time ◽  
Tsinghua University ◽  
High Detection ◽  
High Detection Efficiency ◽  
Star Experiment ◽  
Good Time Resolution

Multi-gap resistive plate camber (MRPC) has been demonstrated to have good time resolution (less than 100 ps), high detection efficiency (higher than 95%) and will be used to construct a full barrel time-of-flight (TOF) detector for the STAR experiment at RHIC. The cylindrical TOF covers a total area of approximately 64 m 2 and about 4000 MRPC modules will be produced. Tsinghua University and University of Science and Technology of China (USTC) are responsible for the STAR MRPC production. In this paper we will describe the Tsinghua and USTC MRPC production facilities. Our MRPC manufacture procedures, detector assembly and testing results are also presented.

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