Photon Counting Instrumentation



TCSPC and Time Tagging Modules

PicoQuant offers modules several modules for Time-Correlated Single Photon Counting (TCSPC), Multi-Channel Scaling (MCS), coincidence correlations or event timing with temporal resolutions between picoseconds and milliseconds. Single channel as well as multichannel versions with either USB or PCIe interface can be provided. All units work in the histogramming mode and offer two time tagging modes. The following table lists the main differences:



HydraHarp 400

Multichannel Picosecond Event Timer & TCSPC Module

  • Up to 8 independent input channels and common sync channel (up to 150 MHz)
  • 65536 histogram bins per channel, minimum width 1 ps
  • Time tagging with sustained count rates up to 40 Mcps
  • Histogrammer measurement ranges from 65 ns to 2.19 s
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Image HydraHarp 400 Multichannel Picosecond Event Timer & TCSPC Module


PicoHarp 300

Stand-alone TCSPC Module with USB Interface

  • Two identical synchronized but independent input channels
  • 65536 histogram time bins, minimum width 4 ps
  • Time tagging with sustained count rates up to 5 Mcps
  • Histogrammer measurement range from 260 ns to 33 µs (depending on resolution)
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Image PicoHarp 300 Stand-alone TCSPC Module with USB Interface


TimeHarp 260 New

TCSPC and MCS board with PCIe interface

  • One or two independent input channels and common synch channel (up to 84 MHz)
  • Two models with either 25 ps (PICO model) or 1 ns (NANO model) base resolution
  • "Long range mode" option for PICO model with 2.5 ns base resolution
  • Ultra short dead time (<25 ns for PICO model, <1 ns for NANO model)
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Image TimeHarp 260 TCSPC and MCS board with PCIe interface



Photon Counting Detectors

The available photon counting detectors include photomultiplier tubes (PMT), Hybrid photomultiplier detectors (HPD) and Single Photon Avalanche Diodes (SPAD) that cover different spectral ranges between the UV and the NIR. Their detection efficiency depends on the individual detector model and can reach maximum values of 70% for the τ-SPAD detectors. All detectors feature timing resolutions in the picosecond range, depending on model and operating conditions. The following table gives a rough overview about the key parameters:



PMA Hybrid Series

Hybrid Photomultiplier Detector Assembly

  • Timing resolution down to < 50 ps (FWHM, cathode dependent)
  • Detection efficiency up to 45 % at 500 nm (cathode dependent)
  • Active area up to 6 mm
  • Negligible afterpulsing
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Image PMA Hybrid Series Hybrid Photomultiplier Detector Assembly


PMA Series

Photomultiplier Detector Assembly

  • Timing resolution < 180 ps (FWHM)
  • Quantum efficiencies up to 40% (cathode dependent)
  • Spectral ranges from 185 nm to 900 nm available
  • Optional thermoelectric cooler
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Image PMA Series Photomultiplier Detector Assembly


τ-SPAD

Single Photon Counting Module

  • Timing resolution down to <350 ps (FWHM)
  • Detection efficiency up to 70%
  • Very low dark counts
  • NIM and TTL signal output
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Image τ-SPAD Single Photon Counting Module


PDM Series

Single Photon Avalanche Diodes

  • Timing resolution down to <50 ps (FWHM)
  • Detection efficiency up to 49%
  • Different active areas: 20, 50 and 100 µm
  • Ultra stable at high count rates
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Image PDM Series Single Photon Avalanche Diodes





Software

PicoQuant offers specialized software for the analysis of fluorescence measurements. This includes a software for global fluorescence decay data analysis as well as a specialized imaging and correlation software, which supports methods like FLIM and FLIM-FRET, FCS, FCCS, FLCS, anisotropy and the analysis of fluorescence time traces.



SymPhoTime 64

Fluorescence Lifetime Imaging and Correlation Software

  • Point, 2D and 3D TTTR data acquisition with online preview of FLIM, FCS, time-traces or TCSPC histograms
  • FLIM, fast FLIM, FLIM-FRET
  • FCS, FCCS, FLCS, PIE-FCS, coincidence correlation, total correlation
  • FRET, PIE-FRET, fluorescence time traces, anisotropy
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Image SymPhoTime 64 Fluorescence Lifetime Imaging and Correlation Software


FluoFit

Global Fluorescence Decay Data Analysis Software

  • Tail fitting or iterative reconvolution, maximum likelihood estimation
  • Exponential decay models up to 4th order
  • Lifetime distribution models (Gaussian, Lorentzian, Stretched Exponentials)
  • Anisotropy analysis with an exponential decay model up to 4th order
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Image FluoFit Global Fluorescence Decay Data Analysis Software





Accessories

Accessories for photon counting experiments include a router for the PicoHarp 300 TCSPC module, a specialized dual channel power supply for SPADs and a trigger diode. Signal conditioners (inverter, attenuator, pre-amplifier or splitter) as well as signal cables can also be provided.



PHR 800

Universal 4-channel detector router for the PicoHarp 300

  • Allows simultaneous measurement of 4 detector signals
  • Adjustable input polarity and trigger threshold
  • Predefined settings for TTL or NIM signals provided by SPAD detectors
  • Optional Constant Fraction Discriminators for PMTs, Hybrid-PMTs and MCP-PMTs
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Image PHR 800  Universal 4-channel detector router for the PicoHarp 300


DSN 102

Dual SPAD Power Supply

  • Two-channel power supply for Single Photon Avalanche Diodes (SPAD)
  • Safety shut-down to prevent SPAD degradation
  • Integrated counter
  • Acoustic monitoring and warning
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Image DSN 102 Dual SPAD Power Supply


TDA 200

Trigger Diode Assembly

  • Compact design
  • Fall time typ. 250 ps
  • Pulse width as short as 500 ps (FWHM)
  • Spectral range from 350 to 1100 nm
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Image TDA 200 Trigger Diode Assembly


PAM 102

Pre-Amplifier Module

  • Fast rise time / wide bandwidth
  • Low jitter
  • Ideal for low output fast photon detectors like MCP and PMT
  • 3 dB bandwidth up to 1.8 GHz
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Image PAM 102 Pre-Amplifier Module


Adapters, Splitters, Cables

Various accessories for photon counting setups

  • Signal attenuators and inverter
  • TTL to NIM converter
  • Power splitter
  • Signal cables
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Image Adapters, Splitters, Cables Various accessories for photon counting setups





Quantum Random Number Generator



PQRNG 150

Quantum Random Number Generator

  • Quantum Random Number Generator based on photon arrival times
  • Bit rate: 150 Mbits/s
  • Interface: USB 2.0
  • Software: driver and user library (DLL) for Windows XP, Vista and 7
  • DLL demos and simple GUI for data retrieval to files

Randomness is an invaluable resource in many areas of science and technology ranging from Monte Carlo simulations to secure encryption methods. While computer generated random numbers can be used for some applications, they remain fundamentally non-random in the sense that anything generated by an algorithm is at least in principle predictable. However, quantum physics provides randomness which is unpredictable based on the fundamental laws of nature.

Based on the quantum randomness of photon arrival times

An accessible and convenient source of quantum randomness is ubiquitously available in the form of single photons. Several photon based random number generators utilizing quantum indeterminism have been proposed and realized in the recent past. However, with respect to commercial availability, not many implementations so far were reliable and/or cost efficient enough for routine use outside the physics laboratory.

Turn-key usability, long term statistical quality, high speed

The PQRNG 150 is a new Quantum Random Number Generator (QRNG) based on the quantum randomness of photon arrival times. It provides turn-key usability, provable and long term statistical quality, and high speed. The design creates a new quality in the sense that it offers substantially higher bit rates than previous solutions available to the public. This has become possible by exploiting most recent photon timing instrumentation and state-of-the-art data processing in hardware. The post-processing algorithm applied to the raw data is based on solid predictions from information theory which guarantee conservation of randomness. This allows for the use of the delivered random numbers in unconditionally secure encryption schemes. The random numbers delivered by the PQRNG 150 have successfully passed the most stringent testing possible today. Results are published in Applied Physics Letters, Vol.098, 171105 (2011) and in Applied Physics Letters, Vol.101, 159901 (2012), which includes results of the re-testing of the generator after 20 months of operation.

For demonstration purposes chunks of random data generated by the PQRNG 150 can be downloaded directly from a dedicated webserver, which also provides continuous streams of random data by means of DLLs for access to the server.


* Installation (when necessary), Technical Support and Service are made exclusively by PicoQuant (info@picoquant.com) *

* Warranty covered by PicoQuant in Germany (The warranty cover parts and labor for equipment returned to the PicoQuant factory in Germany - All costs to send/return the equipment to/from Germany aren't covered by warranty) *




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