https://www.selleckchem.com/pr....oducts/pf-06826647.h
We present a highly accurate Raman spectrometer capable of measuring changes in atmospheric temperature as small as 0.75 K with high spatial and temporal resolution. The spectrometer is based on a laser diode tuned to the resonant absorption line of the 85Rb isotope near 780.0 nm. A heated glass cell containing Rb atoms was used as an ultranarrowband atomic absorption notch filter with 0.3cm-1 bandwidth and optical density as high as four. This filter was placed in front of the spectrograph and blocked up to 99.99% of the elasticall
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