InGaAs Single Photon Counting Module

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Reference number: MPD-InGaAs

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

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Optical Test & Measurement Team
Phone: +49 8153 405-11

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.


MODULE FEATURES:

  • 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

Parameter Notes Min Typ Max Einheit
Active area diameter Free space 25 µm
FC/PC fibre pigtailed (SMF-28) 10
Photon Detection Efficiency Vex=2 V; λ=1550 nm 10 %
Timing jitter (FWHM) At Vex=6 V 70 ps
Darkcountrate Vex=2 V; T=229 K Free space 8 10 kcps
Vex=2 V; T=229 K SM fibre-pigtailed 1 2 kcps
SPAD temperature SW selectable 225 243 K
Gate risetime (20-80%) 2 ns
Excess bias range Free Gate and free running 2 5 V
Fixed Gate 2 7 V
Hold-off time SW selectable in 10 ns steps 1 3000 µs
Gatewidth SW selectable in 1 ns steps 1 1.4 ns-ms
Gate repetition frequenzy 100 MHz
Internal trigger frequency SW selectable in 1 Hz steps 100 100 Hz-MHz
Delay path SW selectable in 1 ns steps 0 100 ns
Counter integration time SW gesteuert in 20 ms steps 0,1 60 s
PHOTON OUT, NIM OUT NIM Output -800 0 mV
Required load (DC) 50 Ω
PHOTON OUT Pulse width 10 ns
TRIGGER IN, AUX IN Amplitude -2 2,5 V
Load Impedance (DC) 50 Ω
Pulse width 800 ps
TTL OUT Output levels 0 2,7 V
Required load (DC) 50

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