EXLTHP-FEATURED

Excelitas SPCM-AQRH Series

Excelitas newly enhanced SPCM-AQRH Single-Photon Counting Module detects single photons over the wavelength range of 400 nm to 1064 nm with performance parameters superior to other solid state or vacuum-tube based photon counters. Single Photon Counting Module The SPCM-AQRH uses a unique silicon avalanche photodiode (SLiK) with a circular active area, achieving peak photon detection efficiency greater than 70% at 650 nm over a 180 µm diameter, with unmatched uniformity over the full active area. A TTL-level pulse is generated for each photon detected and the signal is available at the BNC connector at the rear of the module. The photodiode is both thermoelectrically cooled and temperature controlled, ensuring stabilized performance despite ambient temperature changes. Operating temperature range has been increased and the module will function with case temperatures between 5°C and 70°C. The module comes as standard with a free-space window to the APD, with FC fiber adapter, C-mount or tube cage mount bracket/adapter options. Recent electronic circuit enhancements have reduced the minimum dead time to less than 25 ns, thereby increasing linearity and improving the dynamic range of the module. Timing resolution of the module was also improved significantly. The SPCM-AQRH has internal protection circuitry that protects the avalanche photodiode and the module electronics from damage due to accidental overload from exposure to ambient lighting. Applications - LIDAR - Quantum Cryptography - Photon correlation spectroscopy - Astronomical observation - Optical range finding - Adaptive optics - Ultra-sensitive fluorescence - Particle sizing - Microscopy

Features

- Peak PDE: > 70% @ 650nm - 180µm active area - > 35 Mcps dynamic range - Gated output - Single +5 V supply - RoHS-compliant - Low after pulse probability - High uniformity over large active area - Unmatched linearity - Free space window, FC fiber adaptor, C-mount bracket, Tube cage mount bracket options