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  • Title: Kilometer-range, high resolution depth imaging via 1560 nm wavelength single-photon detection.
    Author: McCarthy A, Krichel NJ, Gemmell NR, Ren X, Tanner MG, Dorenbos SN, Zwiller V, Hadfield RH, Buller GS.
    Journal: Opt Express; 2013 Apr 08; 21(7):8904-15. PubMed ID: 23571981.
    Abstract:
    This paper highlights a significant advance in time-of-flight depth imaging: by using a scanning transceiver which incorporated a free-running, low noise superconducting nanowire single-photon detector, we were able to obtain centimeter resolution depth images of low-signature objects in daylight at stand-off distances of the order of one kilometer at the relatively eye-safe wavelength of 1560 nm. The detector used had an efficiency of 18% at 1 kHz dark count rate, and the overall system jitter was ~100 ps. The depth images were acquired by illuminating the scene with an optical output power level of less than 250 µW average, and using per-pixel dwell times in the millisecond regime.
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