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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Pseudo-random single photon counting: a high-speed implementation.

Qiang Zhang1, Ling Chen, Nanguang Chen

  • 1Division of Bioengineering, National University of Singapore, 117576, Singapore.

Biomedical Optics Express
|January 25, 2011
PubMed
Summary
This summary is machine-generated.

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Pseudo-random single photon counting (PRSPC) offers a low-cost, high-speed alternative to TCSPC for time-resolved optical measurements. This new method achieves a high photon count rate for acquiring temporal profiles, demonstrating robust system performance.

Area of Science:

  • Optics and Photonics
  • Biomedical Optics
  • Photon Counting Techniques

Background:

  • Time-resolved optical measurements are crucial for understanding light-tissue interactions.
  • Conventional time-correlated single photon counting (TCSPC) has limitations in count rate and cost.
  • Developing advanced photon counting methods is essential for high-speed optical acquisition.

Purpose of the Study:

  • To introduce and validate a novel Pseudo-Random Single Photon Counting (PRSPC) system.
  • To demonstrate the system's capability for high-speed acquisition of temporal point spread functions.
  • To highlight the advantages of PRSPC over traditional TCSPC methods.

Main Methods:

  • Modulation of a continuous wave laser diode using a pseudo-random bit sequence.

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  • Signal acquisition via single photon counting to build up the optical response.
  • Periodic cross-correlation analysis to reconstruct the temporal profile of diffuse photons.

    • Main Results:

    • The developed PRSPC system achieves a high photon count rate of up to 3 Mcps.
    • The system enables high-speed acquisition of the temporal point spread function (PSF) of diffuse photons.
    • Phantom experiments confirmed the system's effective performance and reliability.

    Conclusions:

    • PRSPC is a cost-effective and high-count-rate method for time-resolved optical measurements.
    • The PRSPC system offers significant advantages over conventional TCSPC for applications requiring fast data acquisition.
    • This technology holds promise for advanced diffuse optics and biomedical imaging applications.