University of Oulu

T. Talala and I. Nissinen, "Fast Plastic Detection with a Time-Resolved Raman Spectrometer," 2023 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Kuala Lumpur, Malaysia, 2023, pp. 1-6, doi: 10.1109/I2MTC53148.2023.10175939.

Fast plastic detection with a time-resolved Raman spectrometer

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Author: Talala, Tuomo1; Nissinen, Ilkka1
Organizations: 1Circuits and Systems Research Unit, University of Oulu, Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 6.7 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2023
Publish Date: 2023-09-11


The performance of a time-resolved Raman spectrometer equipped with a new CMOS SPAD (single-photon avalanche diode) sensor was studied in fast detection of common plastic types. Sixteen samples, including transparent, white, and colored pieces of polyethylene, polypropylene, polyethylene terephthalate, and polystyrene were measured with different acquisition times and all measurements were repeated 200 times for detection probability calculations. When a time gate width of 450 ps was applied to reject the fluorescence emission, a 99% detection probability was achieved for transparent and white samples with the acquisition time of 250 μs. With colored samples, a 10-ms acquisition time was required to get at least a 99% detection probability for all the samples. For most of the samples, the acquisition time could be reduced when 450 ps time gate width was used instead of 3-ns time gate. For highly fluorescent samples, the reduction in required acquisition time was more than 90%.

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Series: IEEE International Instrumentation and Measurement Technology Conference
ISSN: 2642-2069
ISSN-E: 2642-2077
ISSN-L: 2642-2069
ISBN: 978-1-6654-5383-7
ISBN Print: 978-1-6654-5384-4
DOI: 10.1109/I2MTC53148.2023.10175939
Host publication: 2023 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings
Conference: International Instrumentation and Measurement Technology Conference
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 under Contract 323719.
Academy of Finland Grant Number: 323719
Detailed Information: 323719 (Academy of Finland Funding decision)
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