Available from ID Quantique SA, the id210 advanced system for single-photon detection is suitable for detection at the telecommunications wavelengths of 1310 and 1550 nm. Its performance in high-speed gating at internal or external frequencies up to 100 MHz surpasses the performance of existing detectors by 10 times, according to the company. The system can detect photons with a probability of up to 25% at 1550 nm while maintaining the dark count rate at low levels. It can achieve a timing resolution as low as 250 ps. The id210 provides adjustable delays, adjustable gate duration from 1 to 20 ns and adjustable dead time up to 100 μs. For applications requiring asynchronous detection, the system can operate in free-running mode with detection probability of 2.5% up to 10%.