A LIDAR-compatible, multichannel raman spectrometer for remote sensing of water temperature

Andréa de Lima Ribeiro*, Christopher Artlett, Helen Pask

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)
5 Downloads (Pure)

Abstract

The design and operation of a custom-built LIDAR-compatible, four-channel Raman spectrometer integrated to a 532 nm pulsed laser is presented. The multichannel design allowed for simultaneous collection of Raman photons at two spectral regions identified as highly sensitive to changes in water temperature. For each of these spectral bands, the signals having polarization parallel to (‖) and perpendicular to (⊥), the excitation polarization were collected. Four independent temperature markers were calculated from the Raman signals: two-colour(‖), two-colour(⊥), depolarization(A) and depolarization(B). A total of sixteen datasets were analysed for one ultrapure (Milli-Q) and three samples of natural water. Temperature accuracies of ±0.4 C–±0.8 C were achieved using the two-colour(||) marker. When multiple linear regression models were constructed (linear combination) utilizing all simultaneously acquired temperature markers, improved accuracies of ±0.3 C–±0.7 C were achieved.

Original languageEnglish
Article number2933
Pages (from-to)1-12
Number of pages12
JournalSensors
Volume19
Issue number13
DOIs
Publication statusPublished - 3 Jul 2019

Bibliographical note

Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • LIDAR
  • Natural waters
  • Raman spectroscopy
  • Remote sensing
  • Temperature
  • Water

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