The id220-FR-SMF from id Quantique (Carouge, Switzerland) provides a cost-effective tool for applications that require asynchronous photon detection. The cooled InGaAs/InP avalanche photodiode and associated electronics achieve low dark count and afterpulsing rates in free-running mode. The module operates at two detection probability levels of 10% and 20%, with a deadtime that can be set between 600ns and 25ms. Arrival time of photons is reflected by a 100ns TTL pulse available at the SMA connector; the timing resolution is as low as 250ps at 20% efficiency. A USB interface allows users to set the efficiency level and the deadtime. A standard FC/PC connector followed by a single mode fiber is provided as optical input.
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This week's Question: In recent years, hundreds of millions of dollars have been invested into space ventures. SpaceX, an advanced spacecraft manufacturer founded by Elon Musk, has completed more than 30 successful launches since 2006, delivered...
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