Two-Channel Detecting Sensor with Signal Cross-Correlation for FTIR Instruments.

Autor: Achtenberg K; Institute of Optoelectronics, Military University of Technology, 00-908 Warsaw, Poland., Mikołajczyk J; Institute of Optoelectronics, Military University of Technology, 00-908 Warsaw, Poland., Bielecki Z; Institute of Optoelectronics, Military University of Technology, 00-908 Warsaw, Poland.
Jazyk: angličtina
Zdroj: Sensors (Basel, Switzerland) [Sensors (Basel)] 2022 Nov 18; Vol. 22 (22). Date of Electronic Publication: 2022 Nov 18.
DOI: 10.3390/s22228919
Abstrakt: This paper's purpose was to demonstrate a performance of a novel approach in a low-noise optical sensor for an FTIR spectrometer.
Methods: Compared to the standard FTIR detection setup, our sensor ensures a higher signal-to-noise ratio (SNR) and lower signal standard deviation by reducing the uncorrelated noise components (e.g., thermal and 1/ f noises of the detection module). Its construction is based on two-channel detection modules and a processing unit with implemented cross-correlation signal analyses. Each module was built of LWIR HgCdTe photodiodes and low-noise transimpedance amplifiers.
Results: the experiments demonstrated a decrease in a signal standard deviation of about 1.7 times with a 10 dB-improvement in the SNR.
Conclusion: this result indicates our sensor's main benefit, especially in registered "weak" and noisy interferograms.
Databáze: MEDLINE
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