In this paper, the improvement of range precision in a laser detection and ranging (LADAR) system by using two Geiger mode avalanche photodiodes (GmAPDs) is described. The LADAR system is implemented by using two GmAPDs with a beam splitter and applying comparative process to their ends. Then, the timing circuit receives the electrical signals only if each GmAPDs generates electrical signals simultaneously. Though this system decreases the energy of a laser-return pulse scattered from the target, it is effective in reducing the range precision. The experimental results showed that the average value of standard deviation of time of flights was improved from 61 mm to 37 mm when the pulse energy is 0.6 μJ. When the time bin width is 0.5 ns, the single-shot precision error of the LADAR system was also improved from 280 mm to 67 mm.
Received 01 November 2012Accepted 05 June 2013Published online 26 June 2013
This research was supported by the Defense Acquisition Program Administration and Agency for Defense Development, Korea, through the Image Information Research Center at Korea Advanced Institute of Science & Technology under Contract No. UD100006CD.
Article outline: I. INTRODUCTION II. RANGE PRECISION OF THE LADAR SYSTEM A. Range precision in LADAR system using two GmAPDs B. 3D image obtained by the LADAR system using two GmAPDs III. CONCLUSION
Semiconductor devices sensitive to infra-red radiation, light, electr...
Tae Hoon Kim,
Hong Jin Kong,
Sung Eun Jo,
Byoung Goo Jeon,
Min Seok Oh,
Ayoung Heo and
Dong Jo Park
Source:Rev. Sci. Instrum. 84, 065112 (
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