InGaAs/InP single-photon counting module running up to 133 MHz

  • Tosi A
  • Frera A
  • Shehata A
 et al. 
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We present new circuital solutions for operating InGaAs/InP SPADs
at high speed with very fast avalanche quenching time. A compact
wide-band pulse generator (mounted close to the detector) is able
to gate the SPAD at a repetition frequency from 200 Hz up to 133
MHz. An adjustable amplitude gate-driver allows to trade-off between
photon detection efficiency and dark count rate, while a variable
gate-width precisely selects the time interval during which the detector
is ON. A fast avalanche-quenching scheme, working on both SPAD's
anode and cathode, is able to minimize quenching action to less than
1 ns, thus effectively reducing afterpulsing through a decreased
total charge flowing through the junction. We integrated all such
circuits into a compact detection module, together with a previouslyreported
differential read-out electronics for low time-jitter response. The
performance of the overall module is good in many different setting
points, thus being able to satisfy a wide variety of applications.

Author-supplied keywords

  • InGaAs
  • SPAD
  • sezele

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  • A Tosi

  • A Della Frera

  • A.Bahgat Shehata

  • C Scarcella

  • F Acerbi

  • F Zappa

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