Single Photon Counting Modules (SPCM)

Featured Product from Excelitas Technologies Corp.

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The enhanced SPCM-AQRH offers an unmatched dynamic range and detects single photons over the wavelength range of 400 nm to 1060 nm. Leveraging a unique silicon avalanche photodiode with a circular active area, it achieves peak photon detection efficiency of more than 70% at 700 nm over a 180 µm diameter active area to deliver maximum efficiency. The photodiode is both thermoelectrically cooled and temperature controlled, ensuring stabilized performance despite ambient temperature changes. It also offers over-illumination protection which protects it from ambient light.

The new SPCM-AQRH-TR module is performance optimized specifically to meet the needs of the time-correlated single photon counting market and is intended for highly focused applications like fluorescence lifetime measurements and fluorescence lifetime imaging microscopy. If offers an optimized timing resolution of <250 ps.

The fiber coupled version of the performance-enhanced Single Photon Counting Module, the SPCM-AQRH-FC takes advantage of the unique performance of our SliK™ Single Photon Counting Avalanche Photodiode capabilities. The SPCM-AQRH-FC is an easy-to use solid state photon counter with pre-installed, optically aligned FC connector, where the modular approach takes care of high voltage supply, active quenching and reset, signal processing, active cooling and stabilization. The modules have an over-illumination protection and cannot be damaged by ambient light.

Excelitas' Family of Single Photon Counting Modules (SPCMs) are self-contained modules that offer market-leading photon counting performance in parameters like high Photon Detection Efficiency (PDE), low afterpulsing, highest uniformity over active area, high linear dynamic range, and low dark counts. Our entire series of single photon counting modules are designed and built to be fully RoHS-compliant.

Our SPCMs were the first APD-operated photon counting devices on the market. They use a unique APD that was developed specifically to be operated in so-called "Geiger-mode," which means operated above breakdown voltage, so that a single incoming photon triggers an avalanche of electrons already large enough to be detected and counted as an electronic pulse. The SPCM uses a unique silicon avalanche photodiode (SliKTM) with a circular active area intended for peak photon detection efficiency. The photodiode is both thermoelectrically-cooled and temperature-controlled, ensuring stabilized performance despite ambient temperature changes.