Single photon counting in short visible wavelengths debuts from Excelitas

March 18, 2011 – BUSINESS WIREExcelitas Technologies, optoelectronics provider, introduced the SPCM-UV, part of its SPCM (Single Photon Counting Module) product portfolio, that covers the short visible wavelength range. The UV-enhanced SPCM has peak sensitivity in the 400-500nm range along with high photon detection efficiency (PDE) at short wavelengths, low noise performance, and high dynamic range.

The UV-enhanced SPCM uses a "Geiger-mode" Si APD (UV-SliK) with a circular active area that achieves a peak PDE of over 75% (10%+ more efficient than other offerings, says Excelitas) at 500nm over the full 180µm active area. The photodiode is both thermoelectrically cooled and temperature controlled, ensuring stabilized performance despite ambient temperature changes. The UV-enhanced SPCM’s performance parameters often surpass traditional photomultiplier tubes (PMTs) as well as current silicon APD-based SPCMs.

The SPCM-UV offers low dark counts down to <25cps and low dead time, leading to high dynamic range of >25Mcps. The SPCM also has low dead-time fluctuation, resulting in high linearity. It suits photon correlation spectroscopy, ultra-sensitive fluorescence, confocal microscopy, particle sizing, single-molecule detection, optical range finding, DNA analysis, adaptive optics, and astronomical observation.

The SPCM-UV will also be available in different dark count selections. It is fully RoHS-compliant.

Excelitas Technologies provides custom products for illumination, detection and other high-performance technology needs of OEM customers. The company was previously the Illumination and Detection Solutions (IDS) business unit of PerkinElmer, and is now owned by Veritas Capital. Learn more at

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