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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. Improved version with active quenching coming in Q2 2021.
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Physical Parameters:
| Size | 170mm x 60mm x 110mm |
| Weight | 500g |
Electrical Specifications:
| Supply Voltage | 12V (0.3A, DC 2.1mm socket) |
| Output Pulse | NIM standard (LEMO00 connector) or TTL standard (SMA connector) |
| Pulse Edge Rise/fall Time |
<2ns |
Optical Specifications:
| Wavelength Range | 1020nm to 1650nm |
| Fiberport | FC/APC (internal SMF28e fiber) |
| Photon Detection Efficiency (PDE) |
10% @1320nm |
| Dark Count Rate at 10% PDE |
~10k-30k counts/sec |
| Hold-Off Time | 0 to 300us in 5ns step size, software adjustable |
| APD Min. Operating Temperature | -40°C, user adjustable |
| Timing Jitter | <300ps |
| Dynamic Range | 0-10^6 counts/sec (20ns holdoff ) |
| Quenching | Passive (Active version available Q1 2021) |
| Bias Gating | Continuous, Free running |
| Discriminator Voltage | -30mV, user adjustable |
Interface:
| Host connection | USB CDC ACM class / virtual com port (no device driver necessary) |
| Data format | Serial Text Commands |
