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InGaAs Single Photon Counting Module

Reference: MPD-InGaAs

High-end detection module for NIR-single-photon counting and timing.

0,00 € tax excl.

Eugenie Strasser
Sales Engineer
+49 8153 405-53
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Product description

It is based on an InGaAs/InP SPAD with 25 µm active area diameter (10 µm for fibre-pigtailed version) that allows photon counting from 900 nm to 1.7 µm. The module consists of the detector and the control unit which are integrated in a compact housing. This allows to easily integrate it in any experimental setup.

The electronics surrounding the detector was designed to exploit the good performance of InGaAs/InP SPADs. The module includes a pulse generator for gating the detector, a front-end electronics for avalanche sensing, a fast circuitry for promptly quenching the avalanche current, by acting both at the cathode and at the anode of the detector, and some sub-circuits for signal conditioning.

Thanks to its ease-of-use and great flexibility, all the parameters of the SPAD can be adjusted by the user, in order to optimize the operating conditions according to the measurements to be performed.


  • 25µm active sensing area diameter
  • High Photon Detection Efficiency up to 40% from 900nm to 1550nm 
  • Free Space and Fiber Pigtailed version available
  • Available in different Grade depending on Dark Counts specifications
  • Adjustable PDE and hold-off time
  • Gate width from 1 ns to 500 ns
  • Int. or Ext. trigger up to 133 MHz

Active area diameterFree space25µm

FC/PC fibre pigtailed (SMF-28)10
Photon Detection EfficiencyVex=2 V; λ=1550 nm10%
Timing jitter (FWHM)At Vex=6 V70ps
DarkcountrateVex=2 V; T=229 K Free space810kcps
Vex=2 V; T=229 K SM fibre-pigtailed12kcps
SPAD temperatureSW selectable225243K
Gate risetime(20-80%)2ns
Excess bias rangeFree Gate and free running25V
Fixed Gate27V
Hold-off timeSW selectable in 10 ns steps13000µs
GatewidthSW selectable in 1 ns steps11.4ns-ms
Gate repetition frequenzy100MHz
Internal trigger frequencySW selectable in 1 Hz steps100100Hz-MHz
Delay pathSW selectable in 1 ns steps0100ns
Counter integration timeSW gesteuert in 20 ms steps0,160s
Required load (DC)50Ω
PHOTON OUTPulse width10ns
TRIGGER IN, AUX INAmplitude-22,5V
Load Impedance (DC)50Ω
Pulse width800ps
TTL OUTOutput levels02,7V
Required load (DC)50

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