Fourier transform photoacoustic spectrometer

Lloyd, Lindsay B.; Riseman, Stephen M.; Burnham, Roger K.; Eyring, Edward M.; Farrow, Michael M.

doi:10.1063/1.1136109

Cited by 30 publications

(6 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The solution of these problems, as demonstrated in 1980 by Eyring [7] and by Dkbarre, Boccara and Fournier [8] is to change the retardation incrementally, step-by-step, rather than at constant velocity. By this device the spectral multiplexing of the interferometer is removed from the time domain; there are effectively no Fourier frequencies.…”

Section: Step-scan Ft-ir Pasmentioning

confidence: 99%

See 1 more Smart Citation

Photoacoustic molecular spectroscopy and chemical characterization

Palmer

Jiang

1994

J. Phys. IV France

View full text Add to dashboard Cite

Applications of photoacousticlphotothermal (PAIFT) detection to molecular spectroscopy are reviewed with special emphasis on the use of step-scan Fourier transform infrared (FT-IR) PA spectroscopy for chemical analysis and for spectral depth profiling of laminar and other heterogeneous materials, particularly by use of the phase of the PA signal. Examples are drawn from recent work in our laboratory, as well as from the work of others, as appropriate.

show abstract

Section: Step-scan Ft-ir Pasmentioning

confidence: 99%

“…However, interest in applications of step-scan methods for PAIPT spectroscopy date from 1980. [7][8] The demonstration of the use of the helium-neon laser for optoelectronic feedback control of the position and stepping of the mirror, although originally applied to NIR-Vir; PTS, [8] …”

Section: Step-scan Ft-ir Pasmentioning

confidence: 99%

Photoacoustic molecular spectroscopy and chemical characterization

Palmer

Jiang

1994

J. Phys. IV France

View full text Add to dashboard Cite

show abstract

“…However, sequentially scanning the optical frequency can be time consuming and can lead to potential issues with sample drift or damage between images at different optical frequencies 9,21 . Broadband thermal sources using a Fourier transform spectrometer (FTS) [22][23][24][25] for optical-frequency resolution have been used to overcome sequential scanning, but the low optical power and slow scanning delay arm have limited the application of these systems. Alternatively, broadband supercontinuum coherent laser sources may provide higher power than a thermal source, but still require either sequential frequency scanning or physical scanning of an FTS delay arm and can suffer from high laser intensity noise.…”

mentioning

confidence: 99%

Dual-comb photoacoustic spectroscopy

et al. 2020

View full text Add to dashboard Cite

Spectrally resolved photoacoustic imaging is promising for label-free imaging in optically scattering materials. However, this technique often requires acquisition of a separate image at each wavelength of interest. This reduces imaging speeds and causes errors if the sample changes in time between images acquired at different wavelengths. We demonstrate a solution to this problem by using dual-comb spectroscopy for photoacoustic measurements. This approach enables a photoacoustic measurement at thousands of wavelengths simultaneously. In this technique, two optical-frequency combs are interfered on a sample and the resulting pressure wave is measured with an ultrasound transducer. This acoustic signal is processed in the frequency-domain to obtain an optical absorption spectrum. For a proof-ofconcept demonstration, we measure photoacoustic signals from polymer films. The absorption spectra obtained from these measurements agree with those measured using a spectrophotometer. Improving the signal-to-noise ratio of the dual-comb photoacoustic spectrometer could enable high-speed spectrally resolved photoacoustic imaging.

show abstract

“…Retention Times and Peak Heights ofVarious Concentrations of Chloride Using 1 mM Succinic Acid, 500 x 2 mm Glass Column Packed with TMA-XAD-1, 0.027 mequiv/g,[30][31][32][33][34][35][36][37] m literature values for the limiting equivalent ionic conductances of these two anions were not located. Detection Limits.Table VI lists detection limits for chloride, fluoride, and nitrate with two different eluent acids.…”

mentioning

confidence: 99%