University of Oulu

Hallman, L., Jahromi, S., Jansson, J., Kostamovaara, J. (2018) On Two-Dimensional Rangefinding Using a ∼1 nJ/∼100 ps Laser Diode Transmitter and a CMOS SPAD Matrix. IEEE Photonics Journal, 10 (4), 1-12. doi:10.1109/JPHOT.2018.2819242

On two-dimensional rangefinding using a ∼1 nJ/∼100 ps laser diode transmitter and a CMOS SPAD matrix

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Author: Hallman, Lauri W.1; Jahromi, Sahba1; Jansson, Jussi-Pekka1;
Organizations: 1Faculty of Information Technology and Electrical Engineering, Circuits and Systems Research Unit, University of Oulu
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.1 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2018
Publish Date: 2018-08-29


A potentially compact 2-D range profiler for noncooperative targets with a distance range of >10 m is demonstrated. A laser diode utilizing enhanced gain switching is used as a transmitter to provide short, high-energy optical pulses (~1 nJ/140 ps). Cylindrical lenses spread the laser beam in one dimension and collimate the beam in the other dimension to illuminate a line shaped field of view of about 45°. A similarly shaped field of view for the detector is realized with a single-photon avalanche diode (SPAD) detector matrix. Compared with a flash 3-D rangefinder, the 2-D rangefinding scheme relaxes the SPAD and time-to-digital converter design requirements, increases the signal irradiance at the detector, can have better tolerance for background illumination, and it can be sufficient or advantageous in some applications. The distance measurement precision to each direction is inherently within a few centimeters (FWHM) since the laser pulse width and SPAD detector jitter both correspond with an optical pulse back-and-forth flight time of about a centimeter. Demonstration measurements show >15 Hz line rate and a lateral resolution of about 5 mrad to noncooperative targets at distances of more than 10 m.

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Series: IEEE photonics journal
ISSN: 1943-0655
ISSN-E: 1943-0647
ISSN-L: 1943-0655
Volume: 10
Issue: 4
Article number: 6802712
DOI: 10.1109/JPHOT.2018.2819242
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
114 Physical sciences
Funding: This work was supported by the Academy of Finland, Centre of Excellence in Laser Scanning Research under Contract 307362.
Academy of Finland Grant Number: 307362
Detailed Information: 307362 (Academy of Finland Funding decision)
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