Affiliation:
1. Georgia Institute of Technology
Abstract
Fourier transform spectrometers are commonly used in scientific and industrial settings because of their ability to record complete spectra with high signal-to-noise ratios. Using a single-photon avalanche diode as the detector improves the sensitivity but adds complications in laser-induced fluorescence applications related to detector saturation and acquisition time exceeding the typical scan time. Here, we report a spectrometer for the detection of laser-induced fluorescence signal together with the excitation light, and use the second harmonic signal from the excitation light to correct the phase and calibrate the spectrum, removing the need for a separate calibration source. We achieve a resolution of
0.4
c
m
−
1
in the wavelength range of 1140.2 nm, and demonstrate detection of signals with powers as low as
377
f
W
, with a noise floor of
172
f
W
/
c
m
−
1
.
Subject
Computer Vision and Pattern Recognition,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
2 articles.
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