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•Single Photon Counting Module - COUNT-Series Datasheet
•Single Photon Counting Modules: COUNT^blue Series Datasheet

Laser Components' photon counting modules can now achieve maximum efficiency with improved fiber coupling by integrating a special GRIN lens that images single photons from the fiber onto the detector chip.

Laser Components' SPCM (COUNT modules) offer phenomenally low dark count rates with the best low noise characteristics. In applications where single photons must be detected, it is important to achieve an extremely low dark count rate of the detector as well as a detection efficiency that is as high as possible. Depending on the version, the COUNT modules exhibit efficiencies of >80% at 670 nm and >50% at 405 nm.

The excellent detection rates generated by Laser Components' COUNT series should not be compromised by additional optical elements such as those required in fiber coupling. In modules with FC connectors a special GRIN lens is integrated that images single photons from the fiber onto the detector chip.

The lenses have been optimized with a double-sided AR coating using our in-house IBS coater. This broadband coating from 400-1100 nm has a reflection of less than 1.5%, and has thus led to a reduction in losses in detection efficiency. Because the coating process is performed in house, we are able to provide further optimization for special spectral ranges. Reflections of <<1% with AR coatings in the range from 400 nm to 900 nm or from 600 nm to 1100 nm can be implemented according to customer specifications.

For COUNTblue modules with increased sensitivity in the blue to yellow spectral range, we designed a special AR coating option that has a reflection of less than 1% from 350 nm to 700 nm.

Single Photon Counting Module (SPCM) Applications

• Spectroscopy
• Confocal or STED microscopy
• Single Molecule Detection
• Quantum Cryptography

COUNT - Record-breaking Dark Count Rate, Highest Quantum Efficiency
COUNTblue - Single photon counting modules with even higher efficiencies at shorter wavelengths

More information on LASER COMPONENTS' COUNT series of photon counters

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