Huikari, J., Jahromi, S., Jansson, J., Kostamovaara, J. (2018) Compact laser radar based on a subnanosecond laser diode transmitter and a two-dimensional CMOS single-photon receiver. Optical Engineering, 57 (02), 1. doi:10.1117/1.OE.57.2.024104
Compact laser radar based on a subnanosecond laser diode transmitter and a two-dimensional CMOS single-photon receiver
|Author:||Huikari, Jaakko1; Jahromi, Sahba1; Jansson, Jussi-Pekka1;|
1University of Oulu, Faculty of Information Technology and Electrical Engineering, Circuits and Systems Research Group, Oulu, Finland
|Online Access:||PDF Full Text (PDF, 2.1 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe201804126503
SPIE - International Society for Optical Engineering,
|Publish Date:|| 2018-04-12
A pulsed TOF laser radar utilizing the single-photon detection mode has been implemented, and its performance is characterized. The transmitter employs a QW double-heterostructure laser diode producing 0.6 nJ∕100 ps laser pulses at a central wavelength of ∼810 nm. The detector is a single-chip IC manufactured in the standard 0.35-μmHV CMOS process, including a 9 × 9 single-photon avalanche diode (SPAD) array and a 10-channel time-to-digital converter (TDC) circuit. Both the SPAD array and the TDC circuit support a time gating feature allowing photon detection to occur only within a predefined time window. The SPAD array also supports a 3 × 3 SPADs subarray selection feature to respond to the laser spot wandering effect due to the paraxial optics and to reduce background radiation-induced detections. The characterization results demonstrate a distance measurement accuracy of þ∕ − 0.5 mm to a target at 34 m having 11% reflectivity. The signal detection rate is 28% at a laser pulsing rate of 100 kHz. The single-shot precision of the laser radar is ∼20 mm (FWHM). The deteriorating impact of high-level background radiation conditions on the SNR is demonstrated, as also is a scheme to improve this by means of detector time gating.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
213 Electronic, automation and communications engineering, electronics
Academy of Finland (Centre of Excellence in Laser Scanning Research, Contract No. 272196 and Contracts Nos. 255359, 283075, and 251571); Finnish Funding Agency for Innovation (TEKES). The authors wish to express their gratitude to both the Academy of Finland and TEKES for supporting this work.
|Academy of Finland Grant Number:||
255359 (Academy of Finland Funding decision)
283075 (Academy of Finland Funding decision)
251571 (Academy of Finland Funding decision)
© The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. [DOI: 10.1117/1.OE.57.2.024104].