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Room-temperature operation of InGaAs/InP single-photon avalanche diode detectors operating in free-running mode, with no electrical gating, is demonstrated. An improved design of device structure permitted significantly lower dark count rates than previously reported. Free-running operation at room temperature using an incident wavelength of 1550 nm gave a noise equivalent power of 1.5×10−15 WHz−1/2 with improved photon timing jitter.
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Warburton et al. (2009) studied this question.
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