Talala, T., Kaikkonen, V. A., Virta, E., Mäkynen, A. J., & Nissinen, I. (2023). Multipoint Raman Spectrometer Based on a Time-Resolved CMOS SPAD Sensor. In IEEE Photonics Technology Letters (Vol. 35, Issue 11, pp. 629–632). Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/lpt.2023.3268333
Multipoint Raman spectrometer based on a time-resolved CMOS SPAD sensor
|Author:||Talala, Tuomo1; Kaikkonen, Ville A.2; Virta, Eetu1;|
1Circuits and Systems Research Unit, University of Oulu, 90014 Oulu, Finland
2ptoelectronics and Measurement Techniques Research Unit, University of Oulu, 90014 Oulu, Finland
|Online Access:||PDF Full Text (PDF, 0.8 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe20230929137860
Institute of Electrical and Electronics Engineers,
|Publish Date:|| 2023-09-29
The potential of in-line Raman spectrometers for process monitoring applications has been shown for many industrial processes, but in most cases, only one measurement point has been monitored by one spectrometer. In this letter, we describe and demonstrate a novel, time-resolved method for measuring Raman spectra and fluorescence lifetimes from multiple points using a single excitation source and a single spectrometer. This technique is based on a combination of a time-resolved CMOS SPAD (single-photon avalanche diode) line sensor and a fitting optical light guiding system. The line sensor is designed to make multiple individual measurements at intervals of tens of nanoseconds and the optical light guiding system, in turn, produces matching temporal differences for optical signals from different measurement points. Thereby, signals from different points are distinguished in the time domain. A combined Raman and fluorescence lifetime monitoring of two measurement points was demonstrated with an oil-ethanol emulsion sample.
IEEE photonics technology letters
|Pages:||629 - 632|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
213 Electronic, automation and communications engineering, electronics
This work was supported by the Academy of Finland under Contract 314404, Contract 314405, and Contract 323719.
|Academy of Finland Grant Number:||
314404 (Academy of Finland Funding decision)
314405 (Academy of Finland Funding decision)
323719 (Academy of Finland Funding decision)
© 2023 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/.