1.
Rev Sci Instrum
; 94(9)2023 Sep 01.
Artículo
en Inglés
| MEDLINE
| ID: mdl-37728421
RESUMEN
We report developmental details of a high-sensitivity Stark absorption spectrometer featuring a laser-driven light source. The light source exhibits intensity fluctuations of â¼0.3% over timescales ranging from 1 min to 12 h, minimal drift (≤0.1%/h), and very little 1/f noise at frequencies greater than 200 Hz, which are comparable to or better than an arc-driven light source. Additional features of the spectrometer include balanced detection with multiplex sampling, which yielded lower noise in A, and constant wavelength or wavenumber (energy) spectral bandpass modes. We achieve noise amplitudes of â¼7 × 10-4 and â¼6 × 10-6 in measurements of single A and ΔA spectra (with 92 data points) taking â¼7 and â¼19 min, respectively.