Single Photon Detection
When Every Photon Counts.
Some measurements push beyond the limits of conventional detection.
Single photon detection technologies enable the measurement of extremely low light levels and individual photons for applications in quantum photonics, fluorescence, spectroscopy and time-resolved measurements.
Laser 2000 provides photon counting and single photon detection technologies for demanding scientific and analytical applications.
When Conventional Detection Is Not Enough
Extremely Low Light
Detect optical signals far below the sensitivity of conventional detectors.
Individual Photons
Resolve single-photon events for applications requiring photon-level sensitivity.
Time-Resolved Measurements
Measure precise timing information for fluorescence lifetime, ranging and correlation measurements.
Quantum Photonics
Support quantum communication, quantum sensing and photon-correlation experiments.
These are the core selection and performance factors identified in the LED briefing.
Find the Right Single Photon Detector
The right detector depends on the measurement you need to perform, not only the light level.
Wavelength
Match detector sensitivity to the wavelength range of your application.
Detection Efficiency
Consider how effectively the detector converts incoming photons into measurable signals.
Timing Performance
Evaluate timing resolution for applications requiring precise photon arrival information.
Noise
Account for dark counts and noise characteristics that affect measurement at low light levels.
Measurement Conditions
Consider environmental conditions, integration requirements and operating parameters.
Typical Applications
Quantum Photonics
Quantum communication, quantum sensing and quantum optics research.
Fluorescence
Detect weak fluorescence signals in analytical and biological measurements.
Spectroscopy
Support highly sensitive spectroscopic measurements.
Time-Resolved Measurements
Measure fluorescence lifetime, photon correlation and other time-dependent phenomena.
Scientific Research
Enable experiments requiring extreme sensitivity and precise timing.
Why Laser 2000
We help you select photon-counting and single photon detection technologies based on wavelength, efficiency, timing and noise requirements—for demanding scientific and analytical applications.
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Frequently Asked Questions
How is single photon detection different from conventional detection?
Conventional detectors are not designed to resolve individual photon events or operate reliably at extremely low light levels. Single photon detection technologies use specialised sensors to achieve this level of sensitivity.
What is dark count and why does it matter?
Dark counts are false detection events that occur without an actual incoming photon, contributing to measurement noise. Lower dark count rates generally improve measurement quality at very low light levels.
Can single photon detectors be used for quantum applications?
Yes. Single photon detection technologies are commonly used in quantum communication, quantum sensing and photon-correlation experiments.
Working at the Limits of Light Detection?
Tell us about your wavelength, timing and sensitivity requirements. Our experts can help identify the right photon-counting or detection technology for your application.