Single Photon Counting Modules

With more than 30 years of photon counting design and engineering expertise, Excelitas Technologies proudly delivers high-quality, high-performance Single Photon Counting Modules (SPCMs) designed for the most demanding low-light-level detection applications. We combine our technical expertise with global resources to support the needs of our customers and provide solutions that best meet your photon counting applications. As the first company to introduce SPCMs that utilize the power of silicon avalanche photodiodes (Si APDs), our commitment remains to continue delivering cutting-edge solutions as a market leader and innovator in the photonics industry.

SPCMs are specialized devices used for detecting and counting individual photons with great precision and accuracy. Excelitas utilizes Silicon APDs in manufacturing our photon modules, which are advantageous as they can help achieve maximum peak photon detection over a 180µm diameter circular active area. Temperatures typically increase during this process, so the photodiodes are temperature-controlled using a double-stage thermoelectric cooler to ensure the system’s stability and optimal signal-to-noise ratio as the temperature fluctuates. These capabilities are crucial and well-suited for a wide range of applications, including fluorescence, luminescence, confocal microscopy, time-correlated single photon counting (TCSPC), quantum communications and particle sizing.

Excelitas offers a comprehensive series of high performance SPCMs for the most demanding low-light-level detection applications including:

• SPCM-AQ4C - four-channel photon counting modules that detect single photons between the 400 nm to 1060 nm wavelength range.
• SPCM-AQRH - this module detects single photons of light between the 400 nm to 1064 nm wavelengths while offering superior performance parameters as compared to other solid-state or vacuum-tube-based photon counters.
• SPCM-AQRH-TR - as part of the latest SPCM product generation, this module is specifically selected and optimized to achieve timing resolution while supporting applications in TCSPC, fluorescence lifetime measurements and fluorescence lifetime imaging microscopy (FLIM).
• SPCM-NIR – single-photon counting photon modules that have been performance-optimized for the near-infrared (NIR) wavelength spectrum and designed to support long range light detection and ranging (LiDAR), quantum communication and microscopy applications, among others.

Excelitas offers a comprehensive range of SPCMs well-suited for a wide range of cutting-edge applications, including the following:

• Dynamic Light Scattering (DLS) Particle Sizing
• Stimulated Emission Depletion (STED) & Multi-Photon Microscopy
• Ultra-Sensitive Fluorescence
• Luminescence
• TCSPC
• Single Molecule Detection
• Diffused Correlation Spectroscopy (DCS)
• Single Photon LiDAR
• Optical Range Finding
• Quantum Cryptography (QKD)
• Photon Entanglement Experiments

Yes, we do. Excelitas is a product leader in the design, development and manufacturing of high-quality SPCMs designed to meet your intended applications. Our SPCM solutions follow the strictest standards to ensure their reliability and robust performance. Look through our comprehensive off-the-shelf solutions to find devices that satisfy your performance requirements.

If you are unable to find solutions that match the specifications of your intended application, get in touch with us for customized solutions tailored to your specific needs. We collaborate with you through every stage of the design and development process to ensure the quality of the product without compromising cost, reliability and time-to-market. Rest assured that these products will abide by our strict quality standards.