University of Oulu

I. Nissinen, J. Nissinen and J. Kostamovaara, "On the time gating of SPADs in a synchronized time-gated SPAD array in Raman spectroscopy," 2017 IEEE SENSORS, Glasgow, United Kingdom, 2017, pp. 1-3. doi: 10.1109/ICSENS.2017.8234102

On the time gating of SPADs in a synchronized time-gated SPAD array in Raman spectroscopy

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Author: Nissinen, Ilkka1; Nissinen, Jan1; Kostamovaara, Juha1
Organizations: 1Circuits and Systems Research, Unit University of Oulu, Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.2 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2017
Publish Date: 2018-01-17


The effect of the timing of the biasing of a single photon avalanche diode (SPAD) on the accuracy of a time-gated SPAD array has been studied in this work. The measurement was realized in a time-gated Raman spectrometer utilizing a 16×256 CMOS SPAD array with on-chip time gating electronics. SPADs have to be biased into the Geiger-mode just before arriving Raman scattered photons from the sample to achieve synchronous measurements with a pulsed laser, and to minimize the dark count noise. The practical realization is, however, not straight-forward due to the strict timing requirements (∼50ps). With the shown biasing arrangement high timing accuracy and low noise can be achieved without sacrificing the fill factor of the detector array.

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Series: Proceedings of IEEE Sensors
ISSN: 1930-0395
ISSN-E: 2168-9237
ISSN-L: 1930-0395
ISBN: 978-1-5090-1012-7
ISBN Print: 978-1-5090-1013-4
Pages: 678 - 680
Article number: 8234102
DOI: 10.1109/ICSENS.2017.8234102
Host publication: 2017 IEEE sensors
Conference: IEEE SENSORS
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was supported by the Academy of Finland (Centre of Excellence in Laser Scanning Research, contract no. 272196, and contract nos. 282405 and 292609)
Academy of Finland Grant Number: 282405
Detailed Information: 282405 (Academy of Finland Funding decision)
292609 (Academy of Finland Funding decision)
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