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- W2939176604 abstract "Most extinction measurements require a stable light source to attain high precision and accuracy. Here, we present a convenient approach to normalize light source intensity in broadband optical cavity measurements. In the absence of sample extinction, we show that the in-band signal – the high finesse spectral region of the optical cavity in which sample extinction is measured with high sensitivity – is strongly correlated with the out-of-band signal. The out-of-band signal is insensitive to sample extinction and can act as a proxy for light source intensity. This normalization approach strongly suppressed in-band intensity changes in two incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) instruments with dissimilar light sources and optical cavity properties. Intensity fluctuations in an arc lamp system were suppressed by a factor of 7 to 16 and in the LED spectrometer by a factor of 10. This approach therefore improves the accuracy and precision of extinction measurements where either property is limited by the light source stability." @default.
- W2939176604 created "2019-04-25" @default.
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- W2939176604 date "2019-07-01" @default.
- W2939176604 modified "2023-09-26" @default.
- W2939176604 title "Improving the accuracy and precision of broadband optical cavity measurements" @default.
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- W2939176604 doi "https://doi.org/10.1016/j.saa.2019.04.015" @default.
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