19 May 2012 Photon counting ladar work at FOI, Sweden
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Abstract
Photon counting techniques using direct detection has recently gained considerable interest within the laser radar community. The high sensitivity is of special importance to achieve high area coverage in surveillance and mapping applications and long range with compact systems for imaging, profiling and ranging. New short pulse lasers including the super continuum laser is of interest for active spectral imaging. A special technique in photon counting is the "time correlated single photon counting" (TCSPC). This can be utilized together with short pulse (ps) lasers to achieve very high range resolution and accuracy (mm level). Low average power lasers in the mW range enables covert operation with respect to present laser warning technology. By analyzing the return waveform range and shape information from the target can be extracted. By scanning the beam high resolution 3D images are obtained. At FOI we have studied the TCSPC with respect to range profiling and imaging. Limitations due to low SNR and dwell times are studied in conjunction with varying daylight background and atmospheric turbulence. Examples of measurements will be presented and discussed with respect to some system applications.
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Ove Steinvall, Ove Steinvall, Lars Sjöqvist, Lars Sjöqvist, Markus Henriksson, Markus Henriksson, "Photon counting ladar work at FOI, Sweden", Proc. SPIE 8375, Advanced Photon Counting Techniques VI, 83750C (19 May 2012); doi: 10.1117/12.920294; https://doi.org/10.1117/12.920294
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