Infrared free-running single-photon detector
Keywords:
Infrared free-running single-photon detector
Product Overview
The WT-SPDM400 infrared free-running single-photon detector module employs a negative-feedback InGaAs/InP single-photon avalanche diode (NFAD) as its photosensitive element. The element operates in Geiger mode and features rapid avalanche quenching, effectively suppressing the afterpulse effect. An internal temperature-control circuit ensures that the APD operates at a low temperature, thereby reducing the dark count rate. Additionally, the module allows for adjustable dead times—both short and long—which further help to suppress the afterpulse effect.
The WT-SPDM400 infrared free-running single-photon detector module stores factory-calibrated configuration parameter information internally and supports automatic loading of these parameters upon power-up. Its modular design facilitates easy integration and makes it suitable for applications where the photon arrival time is uncertain, such as LiDAR and fluorescence lifetime measurements.
Product Parameters
| Parameter Name | Minimum | Typical | Maximum | Unit | |
| Wavelength range | 1100 | 1550 | 1600 | nm | |
| Detection efficiency | 10 | 20 | 30 | % | |
| Dark count rate @η=25% |
Standard Edition |
|
2 |
|
kHz |
| Low-noise version |
|
1 |
|
kHz | |
| Post-pulse rate @ η = 25% |
|
6 |
|
% | |
| Storage temperature | -15 |
|
55 | Celsius | |
| Operating temperature | 0 |
|
40 | Celsius | |
| Chassis dimensions (W×H×D) | 170×114×35.5 | mm | |||
| Power supply | +12 | VDC | |||
| Power |
|
|
25 | W | |
Scope of application
● Quantum Cryptographic Communication
● Quantum optics, biophotonics
● Laser rangefinding, LiDAR
● Atmospheric and water environment monitoring
● Fluorescence Lifetime and Fluorescence Spectroscopy
● Time-resolved single-molecule spectroscopy
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