Features
• 10% Photon Detection Efficiency
• Single-photon sensitivity from 1020 nm to 1650 nm
• Free-running
• Dark counts below 25,000 Hz at 10% PDE and 243K set operatingtemperature
• Detection timing jitter below 300 ps
• User-adjustable diode parameters (temperature, threshold, hold-offtime, reverse-bias voltage)
• TTL or NIM compatible output signals
• Integrated detection events counter• SMF-28 fiber pigtailed on input optical connector
General Description
The IRSPD1 is a single-photon detector module sensitive to the infrared wavelength spectrum from 1020-1650nm. The photodetection is performed by a passively quenched InGaAs/InP avalanche photodiode in Geiger mode cooled to -40°C allowing a nominal efficiency of 10% at 1330nm and dark counts of 10-20k counts/sec. The device has an onboard counter and does not require a driver to operate. The host and device communicate only by a serial interface via the USB port.
Physical Parameters:
| Size | 78mm x 155mm x 68mm |
| Weight | 950g |
Electrical Specifications:
| Supply Voltage | 12V (DC 2.1mm socket) |
| Output Pulse | NIM standard (LEMO00 connector) or TTL standard (SMA connector) |
| Holdoff Independent Pulsewidth | 1.7 · · · 33.9 ns |
| Hold-Off Time | 10 to 327,675 ns in 5ns step size |
| Timing Jitter | 196 ps |
| Quenching | Passive |
| Bias Gating | Continuous, Free running |
Diode Properties:
| Wavelength Range | 1020nm to 1650nm |
| Fiberport | FC/UPC (internal SMF28e fiber) |
| Photon Detection Efficiency (PDE) | Min 10% @1320nm |
| Dark Count Rate at 10% PDE | ~10k-30k counts/sec |
| APD Min. Operating Temperature | -40°C, user adjustable |
Interface:
| Host connection | USB CDC ACM class / virtual com port (no device driver necessary) |
| Data format | Serial Text Commands |