Open AccessReal-time FPGA data collection of pulsed-laser cavity ringdown signals
Author(s) -
Thomas G. Spence,
Maria E. Calzada,
H M Gardner,
E Leefe,
H B Fontenot,
Lukas Gilevicius,
Robert J. Hartsock,
Toby K. Boyson,
C. C. Harb
Publication year - 2012
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.008804
Subject(s) - spectrometer , optics , laser , absorbance , field programmable gate array , data acquisition , data extraction , cavity ring down spectroscopy , data collection , physics , materials science , computer science , computer hardware , chemistry , biochemistry , medline , operating system , statistics , mathematics
This paper presents results from a pulsed-laser cavity ring-down spectrometer with novel field programable gate array real-time data collection. We show both theoretically and experimentally that the data extraction can be achieved from a single cavity ringdown event, and that the absorbance can be determined without the need to fit the ringdown time explicitly. This methodology could potentially provide data acquisition rate up to 1 MHz, with the accuracy and precision comparable to nonlinear least squares fitting algorithms.