Superconducting Single Photon Detecting Systems (SSPD)

Scontel offers single photon detectors and ultra-low noise single-photon registration systems for the VIS and NIR range. All systems operate in a continuous mode (no gating).

The system is based on fiber-coupled NbN superconducting single photon detectors and have several independent channels (up to 8). Scontel offers two types of cooling systems:

1) Cryogen-free system (Type 1).

The Closed-Cycle Refrigerator is a cryogen-free cooling system (the operating temperature is 2.5K). This type of detection system would be ideal for those who want to avoid handling with liquid helium. A particular advantage is that closed-cycle refrigerators can operate continuously for months from just an electrical power source.

2) Cryogenic insert to standard LHe storage dewar (Type 2).

This allows for using SSPDs without expensive cryogenic equipment. The storage dewar filled with 60 litters of helium allows for over 2 months of uninterrupted operation of the system. Operating temperature of the system is either 4.2 K or 1.6 К. In the second case in order to achieve the highest specs, the helium vapor is pumped via a capillary connected to detector’s chamber.


System specifications
Quantum Efficiency: ≥ 85 %
Timing jitter: ≤ 45 ps  (20 ps on request)
Dark counts rate: ≤ 10 cps  (0.1 cps on request)
Spectral range: 0.6 ÷ 2.3 µm
No afterpulsing
Fiber coupling (no misalignment)
Operation in a continuous mode
General parameters
Number of channels: 1-8
Fiber: SMF-28e  
Original output voltage: ≤ 150 mV
Types of output voltage: TTL, ECL, LVDS
Electrical connection: SMA
Driver interface: USB, LabVIEW
Possible Applications:
· Photonic quantum computing
· Photon correlation measurements
· Quantum cryptography and QKD
· CMOS defect analysis
· Single α and β particles detection
· Single molecule fluorescence spectroscopy
· Ballistic imaging
· Single plasmon detection, quantum plasmonics
· Free space communication
· Time-resolved fluorescence measurements
· Single quantum dot fluorescence spectroscopy
· On-chip quantum optics
· Oxygen singlet/triplet fluorescence detection
· Flow cytometry
· Picosecond Integrated Circuits Analysis (PICA)
· Single electron detection
· Registration of extra low IR photon flux
· Optical coherence tomography

Typical dependence of the detection efficiency.

Special offer on request.