On the measurement of intensity correlations from laboratory and astronomical sources with SPADs and SNSPDs

Edward Schroeder, Philip Mauskopf, Genady Pilyavsky, Adrian Sinclair, Nathan Smith, Sean Bryan, Hamdi Mani, Dmitry Morozov, Karl Berggren, Di Zhu, Konstantin Smirnov, Yuriy Vakhtomin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


We describe the performance of detector modules containing silicon single photon avalanche photodiodes (SPADs) and superconducting nanowire single photon detectors (SNSPDs) to be used for intensity interferometry. The SPADs are mounted in fiber-coupled and free-space coupled packages. The SNSPDs are mounted in a small liquid helium cryostat coupled to single mode fiber optic cables which pass through a hermetic feed-Through. The detectors are read out with microwave amplifiers and FPGA-based coincidence electronics. We present progress on measurements of intensity correlations from incoherent sources including gas-discharge lamps and stars with these detectors. From the measured laboratory performance of the correlation system, we estimate the sensitivity to intensity correlations from stars using commercial telescopes and larger existing research telescopes.

Original languageEnglish (US)
Title of host publicationOptical and Infrared Interferometry and Imaging V
EditorsMichelle J. Creech-Eakman, Fabien Malbet, Peter G. Tuthill
ISBN (Electronic)9781510601932
StatePublished - 2016
EventOptical and Infrared Interferometry and Imaging V - Edinburgh, United Kingdom
Duration: Jun 27 2016Jul 1 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherOptical and Infrared Interferometry and Imaging V
Country/TerritoryUnited Kingdom


  • FPGA
  • Hanbury Brown and Twiss
  • Intensity interferometry
  • ROACH2
  • Single Photon Avalanche Diode
  • Superconducting Nanowire Single Photon Detector
  • Time-to-digital converter

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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