1. High detection efficiency and low noise

• High quantum efficiencyThe quantum efficiency in the near-infrared band (such as 900-1700nm) can reach 25% -45%, and some models (such as PDM-IR) can even exceed 40% at specific bias voltages, effectively capturing single photon signals.
• Low dark count rateThe dark count rate (noise) can be as low as 500-800 CPS (counts per second), and some models further suppress noise through cooling technology (such as InGaAs/InP avalanche photodiodes) to ensure signal purity.

2. Fast gating and time resolution

• High speed gate controlGate control frequency up to 1.25GHz (such as APCS-1250A), supports nanosecond level time resolution, and can accurately capture photon arrival time.
• Low time jitterThe time resolution (FWHM) is as low as 60-150 ps, meeting the requirements of high-precision time related measurements such as fluorescence lifetime analysis and LiDAR ranging.

3. Flexible working mode

• gated modeSynchronized detection through external triggering signals to avoid saturation or false detection, suitable for pulse light signal detection.
• Free running modeWithout external triggering, it can continuously detect photons and is suitable for random photon flow scenarios (such as free running detection in quantum key distribution).
• Convenient mode switchingSome models (such as SPD-N IR) support software interface switching modes to meet different experimental needs.

4. Compact design and integration

• miniaturizationAdopting modular design (such as APD-M2) and compact size (such as 95x95x95mm), it is easy to integrate into complex systems.
• Multi interface compatibilitySupports free space, single-mode fiber (SMF), multi-mode fiber (MMF) coupling, and adapts to multiple optical path structures.
• low power consumptionSome models have a power consumption of less than 15 VA and are suitable for portable or space limited applications.

5. Widely applicable scenarios

• quantum communicationUsed for synchronous photon detection in quantum key distribution (QKD) to ensure key security.
• LidarSupports high-precision ranging and 3D imaging, suitable for autonomous driving and terrain surveying.
• bioimagingRealize ultra sensitive fluorescence detection and single-molecule spectroscopic analysis to assist biomedical research.
• industrial inspectionUsed for high-precision industrial scenarios such as integrated circuit testing and non-destructive material analysis.