Photon-counting chirped amplitude modulation lidar with 1.5-GHz gated InGaAs/InP APD

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Abstract

We demonstrated a photon-counting chirped amplitude modulation (CAM) Lidar at 1550 nm. In the previous studies, the CAM bandwidth was limited <30 MHz due to the large dead time of the single-photon detectors. In our CAM Lidar system, an InGaAs/InP avalanche photodiode was operated in 1.5-GHz sine-wave gated Geiger mode to reduce the dead time to 6.4 ns. As a result, the CAM bandwidth exceeded 200 MHz, while the modulation period was 0.5 ms, leading to a direct distance accuracy of 0.12 m in daylight environment. This system presented a potential for high accuracy and eye-safe CAM Lidar system.

Original languageEnglish
Article number7003977
Pages (from-to)616-619
Number of pages4
JournalIEEE Photonics Technology Letters
Volume27
Issue number6
DOIs
StatePublished - 15 Mar 2015
Externally publishedYes

Keywords

  • Avalanche photodiodes (APDs)
  • Lidar
  • Photon-counting

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