Dynamic Brillouin microscopy imaging

Doktor, Dominik A.; Coker, Zachary; Cheburkanov, Vsevolod; Lalonde, Joshua W.; O’Connor, Sean P.; Yakovlev, Vladislav V.

doi:10.1117/12.2550934

Cited by 3 publications

(1 citation statement)

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“…There is also stimulated Brillouin spectroscopy (SBS), which further improved the reliability and accuracy of such measurements 13,14 . A transient grating variant named impulsive stimulated Brillouin scattering (ISBS) spectroscopy has been recently used to find a plethora of application in the biomedical field [15][16][17] , showing profound results in flow cytometry 18 , the viscoelastic measurements of biological compounds in aqueous solutions [19][20][21] , and the assessment of the water content of hydrogels for biomedical purposes 22 . However, the application of ISBS should not only be restricted to the biomedical field as it can investigate a wide variety of materials, as long as they are mostly transparent.…”

Section: Introductionmentioning

confidence: 99%

Examining viscoelastic properties of petroleum products using impulsive stimulated Brillouin scattering

Doktor

O’Connor

Yakovlev

2023

Nonlinear Frequency Generation and Conversion: Materials and Devices XXII

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Petroleum products such as gasoline or oils tend to age over time with iterative thermocycles, leading to a degradation in quality. To investigate this aging process, spectroscopy techniques involving nonlinear four-wave mixing have been recently used to shed light on the viscoelastic properties of these materials. Impulsive stimulated Brillouin scattering is an emerging spectroscopy technique for monitoring changes in the mechanical properties of materials by using a transient laser grating to create acoustic waves within the sample. A probe beam then diffracts off of this standing acoustic wave and yields in a frequency shift detected using optical heterodyning. Impulsive stimulated Brillouin scattering was used to examine mineral oils, motor oils, and a variety of different gasoline grades. The gasoline samples underwent thermocycling to 70°C and back to room temperature to observe viscoelastic differences and noticeable hysteresis.

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Section: Introductionmentioning

confidence: 99%

Examining viscoelastic properties of petroleum products using impulsive stimulated Brillouin scattering

Doktor

O’Connor

Yakovlev

2023

Nonlinear Frequency Generation and Conversion: Materials and Devices XXII

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Sensitive impulsive stimulated Brillouin spectroscopy by an adaptive noise-suppression Matrix Pencil

Li¹,

Zhang

Lu³

et al. 2022

Opt. Express

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Impulsive stimulated Brillouin spectroscopy (ISBS) plays a critical role in investigating mechanical properties thanks to its fast measurement rate. However, traditional Fourier transform-based data processing cannot decipher measured data sensitively because of its incompetence in dealing with low signal-to-noise ratio (SNR) signals caused by a short exposure time and weak signals in a multi-peak spectrum. Here, we propose an adaptive noise-suppression Matrix Pencil method for heterodyne ISBS as an alternative spectral analysis technique, speeding up the measurement regardless of the low SNR and enhancing the sensitivity of multi-component viscoelastic identification. The algorithm maintains accuracy of 0.005% for methanol sound speed even when the SNR drops 33 dB and the exposure time is reduced to 0.4 ms. Moreover, it proves to extract a weak component that accounts for 6% from a polymer mixture, which is inaccessible for the traditional method. With its outstanding ability to sensitively decipher weak signals without spectral a priori information and regardless of low SNRs or concentrations, this method offers a fresh perspective for ISBS on fast viscoelasticity measurements and multi-component identifications.

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Spectral resolution enhancement for impulsive stimulated Brillouin spectroscopy by expanding pump beam geometry

O’Connor¹,

Doktor²,

Scully³

et al. 2023

Opt. Express

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Brillouin microscopy has recently emerged as a powerful tool for mechanical property measurements in biomedical sensing and imaging applications. Impulsive stimulated Brillouin scattering (ISBS) microscopy has been proposed for faster and more accurate measurements, which do not rely on stable narrow-band lasers and thermally-drifting etalon-based spectrometers. However, the spectral resolution of ISBS-based signal has not been significantly explored. In this report, the ISBS spectral profile has been investigated as a function of the pump beam’s spatial geometry, and novel methodologies have been developed for accurate spectral assessment. The ISBS linewidth was found to consistently decrease with increasing pump-beam diameter. These findings provide the means for improved spectral resolution measurements and pave the way to broader applications of ISBS microscopy.

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Dynamic Brillouin microscopy imaging

Cited by 3 publications

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Examining viscoelastic properties of petroleum products using impulsive stimulated Brillouin scattering

Examining viscoelastic properties of petroleum products using impulsive stimulated Brillouin scattering

Sensitive impulsive stimulated Brillouin spectroscopy by an adaptive noise-suppression Matrix Pencil

Spectral resolution enhancement for impulsive stimulated Brillouin spectroscopy by expanding pump beam geometry

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