Abstract
Sensitive laser ranging was demonstrated at few-photon level using photon-number-resolving (PNR) detectors. The reflected photon pulses from a non-cooperation remote target were distinguished in a sunlight environment of 2.5 × 103 lx by setting the discrimination threshold at 5-photon level. By comparing the detected photon numbers, two remote targets with different reflection coefficients were well recognized. PNR detection facilitated remote laser ranging of few-photon sensitivity with similar capabilities of linear optical detectors. This technique avoids photon-counting saturation and is important for ultra-long distance LIDAR and 3D imaging at a few photon level.
| Original language | English |
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| Pages (from-to) | 3908-3912 |
| Number of pages | 5 |
| Journal | Applied Optics |
| Issue number | 18 |
| DOIs | |
| State | Published - 20 Jun 2014 |