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  • SPD_A_M2 Single Photon Counter
Feb 2011
AUREA Technology
BESANÇON, France, Feb. 8, 2011 — The SPD_A_M2 manufactured by Aurea Technology is a family of ultralow-noise, high-quantum-efficiency near-infrared (900 to 1700 nm) single photon detectors. Their Geiger-mode InGaAs avalanche photodiode and thermoelectric cooler ensure high detection efficiency, a low and stable dark count, high speed and low jitter, with a performance superior to 5 × 10-6 per nanosecond.

They exhibit good sensitivity in high-level detection, making them more effective than photomultipliers and micro channel plate photomultipliers, according to the company. Most photomultipliers deliver quantum efficiency of <1% in the near-infrared, while the SPD_A_M2’s is adjustable from 5% up to 25%.

The RoHS-compliant devices provide plug-and-play connection to PCs via a USB interface, allowing users to easily adjust detection efficiency and to tune gate width and delay. They are supplied with a graphical user interface, but end users can develop their own with LabView or C++.

Optical fiber is single- or multimode, cooling time is <1 min at 25 °C, and peak detection is from 1150 to 1600 nm.

Applications include single photon counting, time-correlated single photon counting, quantum cryptography, failure analysis of integrated circuits, fluorescence, spectroscopy, eye-safe laser-ranging lidar, optical time domain reflectometry and quantum key distribution.

The emission of light or other electromagnetic radiation of longer wavelengths by a substance as a result of the absorption of some other radiation of shorter wavelengths, provided the emission continues only as long as the stimulus producing it is maintained. In other words, fluorescence is the luminescence that persists for less than about 10-8 s after excitation.
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