Laser 2000

PDM-IR

PDM-IR

For more information check the datasheet or contact our experts for guidance.

The PDM-IR is a photon counting module based on an InGaAs/InP Single-Photon Avalanche Diode (SPAD) for the detection of near-infrared single photons up to 1700 nm (see PDE graphs). The module includes a programmable frequency and pulse generator for gating the detector, a front-end circuit for photodetector’s avalanche sensing, a fast circuit for detector’s avalanche current quenching and operative bias voltage resetting and some sub-circuits for signal conditioning. All the main parameters and delay paths are adjustable by the user through the software interface, in order to match the requirements of different applications. The system can be conveniently used both for counting and timing measurements, since the high-performance electronics guarantees a clean temporal response even with fast gate transitions (see typical IRF curves displayed here below). PDM-IR can work either in free-running or in gated mode and the optical interface can be chosen between free space and a pigtailed version. Here below typical DCR vs Hold-Off are shown for both gated and free-running modes.

System requirements (software and SDK):

  • The host computer (minimum requirements): USB 2.0 interface, 1 GHz processor and 512 MB of RAM
  • Supported operating systems
  • VisualPDM-IR
  • Microsoft 7, 8,10, 32- or 64-bit versions

SDK:

  • Microsoft 7, 8,10, 32- or 64-bit versions
  • Linux Ubuntu 12.04 LTS, Fedora Core 15 or compatible distributions, 32- or 64-bit versions
  • Mac OS X 10.7.5 and above

 

Freespace
Parameter Notes Min Typ Max Units
SPAD Active Area Diameter 25 µm
Photon Detection Efficiency Vex = 7V, λ=1550 nm 32 %
Timing Jitter (FWHM) At VEX = 4 V (all working modes) 100 130 ps
At VEX = 7 V (Fixed Gate mode only) 60 ps
Minimum Wavelength for IRF with SHORT TAIL Below 975 nm photons are absorbed in the top InP layer only 975 nm
DCR (dark counting rate) At VEX = 2 V, Temperature set to “Low”, module in free running mode, hold-off time = 100 µs 5 10 kcps
SPAD Temperature SW Selectable 225 243 K
Gate Rise Time (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 @ 10 ns step 1 3000 µs
Gate Width SW selectable @ 1 ns step 1 n 1.5 m s
Gate Repetition Frequency 100 MHz
Internal Trigger Frequency SW selectable @ 1 Hz step 100 100 M Hz
Delay path SW selectable @ 1 ns step 0 100 ns
Counter Integration Time SW selectable @ 20 ms step 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 Ω
Power Supply Power 15 VA
DC INPUT Voltage 11.4 12 12.6 V
Operating range Ambient temperature 15 35 °C
Fibre Pigtailed
Parameter Notes Min Typ Max Units
Fibre Pigtail Type FC/PC – uses 10 µm SPAD SMF-28
FC/PC – uses 25 µm SPAD MMF 50 µm GI NA=0.2
Photon Detection Efficiency Vex = 7V, λ=1550 nm 25 %
Timing Jitter (FWHM) At VEX = 4 V (all working modes) 90 130 ps
At VEX = 7 V (Fixed Gate mode only) 50 70 ps
Minimum Wavelength for IRF with SHORT TAIL Below 975 nm photons are absorbed in the top InP layer only 975 nm
DCR (dark counting rate) At VEX = 2 V, Temperature set to “Low”, module in free running mode, hold-off time = 100 µs SMF-28 0.5 1 kcps
MMF-50GI 2.6 5 kcps
SPAD Temperature SW Selectable 225 243 K
Gate Rise Time (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 @ 10 ns step 1 3000 µs
Gate Width SW selectable @ 1 ns step 1 n 1.5 m s
Gate Repetition Frequency 100 MHz
Internal Trigger Frequency SW selectable @ 1 Hz step 100 100 M Hz
Delay Path SW selectable @ 1 ns step 0 100 ns
Counter Integration Time SW selectable @ 20 ms step 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 Ω
Power Supply Power 60 VA
DC INPUT Voltage 22.8 24 25.2 V
Operating Range Ambient temperature 15 35 °C

1See the user-manual for the full list of module’s specifications. Module designed and built compliant with the European Union Directive 2011/65/CE (also known as RoHS 2).

PDM-IR Datasheet – Freespace
PDM-IR Datasheet – Fibre Pigtailed
Technical Note: TCSPC measurements with the InGaAs/InP Single-photon counter
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