The field of single photon counting and time-resolved applications has seen spectacular advancements recently, thanks in part to the evolution of Quantum Key Distribution.

Ultra-sensitive detectors can detect the smallest light signal or the farthest away. Precision electronics enable long distance communication using secure protocols suitable for communicating with space craft. Quantum Photonics now allows to address some of the biggest challenges in healthcare, engineering and information technology while leading to innovative applications in fields as diverse as metrological standards or biological imaging.

Quantum Physics

Understanding QKD

Quantum cryptography exploits Heisenberg’s uncertainty principle, which prevent an eavesdropper from discovering the exact quantum state of a system, to allow two remote parties to exchange a cryptographic key in a provably secure manner.

Life Sciences

Dynamic Light Scattering

Dynamic Light Scattering (DLS), also known as Photon Correlation Spectroscopy (PCS) or Quasi-Elastic Light Scattering (QELS) is commonly used to determine the size of small particles in a solution. This application note describes the use of the ID100 single photon counting detector for the measurement of light scattered by small particles.
Learn more

Fluorescence Lifetime Measurement

This application note explains the advantages brought by the ID100-20 module over commercially available photomultiplier tubes (PMTs) and single photon counting modules for fluorescence lifetime measurements.
Learn more

Singlet Oxygen Detection

We describe how singlet oxygen fluorescence can be observed and quantified using an ID230 detector together with an ID900 Time Controller.
Learn more


Single-photon detectors used in free space communication

Single photon detectors are a good solution to the detection of low intensity signals in FSO communication systems with extreme timing accuracy (down to 50 ps). It helps to distinguish synchronous signals from noise, which has a random time of arrival. Alternatively, several bits may be encoded on a single photon.


Optical fibers characterisation

In this application note, we will give an overview of how single-photon detectors may be used to build a custom optical time-domain reflectometers from benchtop instruments. Adapting the OTDR system to the user’s desired measurement, as well as an appropriate choice of detector, will result in significantly higher performance than what can be obtained with commercial OTDRs.

Material Science

Contact us for more info at :

Particle Physics

Contact us for more info at :