Dual-Contrast Nonlinear Photoacoustic Sensing and Imaging Based on Single High-Repetition- Rate Pulsed Laser

Lan, Hengrong; Duan, Tingyang; Jiang, Daohuai; Zhong, Hongtao; Zhou, Meng; Gao, Fei

doi:10.1109/jsen.2019.2902849

Cited by 14 publications

(9 citation statements)

References 29 publications

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“…When the pulse repetition period ∆t = 16 (Figure 5a) significantly exceeds the thermal diffusion time (9), the thermal relaxation regime R N = 1 is realized. In this regime, the heated oil layer manages to transfer heat to the environment before the next laser pulse comes.…”

Section: Resultsmentioning

confidence: 99%

“…The condition characterizing the detectability of oil by the proposed OA method (7) remains valid not only for optically thick (3), but also for thinner oil films whose thickness d exceeds the axial spatial resolution of the acoustical detector. OA pressure recorded from a laser pulse with a number N can be estimated using formula (8), which is valid when the condition (9) for the duration of a laser pulse train is satisfied and also in the absence of a temperature dependence of the optical absorption coefficient (10):…”

Section: Theoretical Modelmentioning

confidence: 99%

“…Figure 5 presents the results of calculating the correlation coefficients using formula ( 13) and allows us to track the processes of linear and nonlinear transformation of the OA pulse shapes ( ) at various parameters of the laser probing. When the pulse repetition period Δ = 16 (Figure 5a) significantly exceeds the thermal diffusion time (9), the thermal relaxation regime = 1 is realized. In this regime, the heated oil layer manages to transfer heat to the environment before the next laser pulse comes.…”

Section: Oil Film Characterization In Thermal Relaxation and Nonlinear Regimesmentioning

confidence: 99%

“…While to perform OA diagnostics of single measurement volume it is necessary to illuminate this volume with the laser pulse, the development of laser technologies makes it possible to carry out subsequent OA measurements at laser pulse repetition rates exceeding 1 kHz [ 6 ]. At these frequencies, the manifestation of the so-called nonlinear effect becomes possible [ 7 ], which consists of a change in the shape and amplitude of the second and subsequent OA pulses associated with the heating of the medium under study due to the absorption of the first laser pulse and incomplete relaxation of the temperature of the medium to the baseline level before exposure to the second [ 8 ] and subsequent [ 9 ] laser pulses. If the recorded nonlinear distortions of OA pulses are caused by the known temperature dependence of the Grüneisen parameter, the measurements of nonlinear distortions can be used to map the internal temperature of the object under study [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Optoacoustic Sensing of Surfactant Crude Oil in Thermal Relaxation and Nonlinear Regimes

Subochev

Kurnikov

Сергеева

et al. 2021

Sensors

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We propose a laser optoacoustic method for the complex characterization of crude oil pollution of the water surface by the thickness of the layer, the speed of sound, the coefficient of optical absorption, and the temperature dependence of the Grüneisen parameter. Using a 532 nm pulsed laser and a 1–100 MHz ultra-wideband ultrasonic antenna, we have demonstrated the capability of accurate (>95%) optoacoustic thickness measurements in the 5 to 500-micron range, covering 88% of slicks observed during 2010 oil spill in the Gulf of Mexico. In the thermal relaxation regime of optoacoustic measurements, the value of optical absorption coefficient (30 mm−1) agreed with the data of independent spectrophotometric measurements, while the sound speed (1430 m/s) agreed with the tabular data. When operating in a nonlinear regime, the effect of local deformation of the surface of the oil film induced by heating laser radiation was revealed. The dose-time parameters of laser radiation ensuring the transition from the thermal relaxation regime of optoacoustic generation to nonlinear one were experimentally investigated. The developed OA method has potential for quantitative characterization of not only the volume, but also the degree and even the type of oil pollution of the water surface.

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Section: Resultsmentioning

confidence: 99%

Section: Theoretical Modelmentioning

confidence: 99%

Section: Oil Film Characterization In Thermal Relaxation and Nonlinear Regimesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optoacoustic Sensing of Surfactant Crude Oil in Thermal Relaxation and Nonlinear Regimes

Subochev

Kurnikov

Сергеева

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…This is realized by extracting the term containing tissue-dependent properties (

and

) using the nonlinear model. A similar work using the nonlinear mechanism to distinguish different types of materials was shown in Ref [ 114 ]. In this work, dual imaging contrast—both the optical absorption contrast (

) and thermal contrast (

) were employed independently to resolve different samples (muscles and fat tissues).…”

Section: The Progress In Nonlinear Photoacousticsmentioning

confidence: 97%

Nonlinear mechanisms in photoacoustics—Powerful tools in photoacoustic imaging

Gao

Ren

et al. 2021

Photoacoustics

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Many nonlinear effects have been discovered and developed in photoacoustic imaging. These nonlinear mechanisms have been explored for different utilizations, such as enhancing imaging contrast, measuring tissue temperature, achieving super-resolution imaging, enabling functional imaging, and extracting important physical parameters. This review aims to introduce different nonlinear mechanisms in photoacoustics, underline the fundamental principles, highlight their representative applications, and outline the occurrence conditions and applicable range of each nonlinear mechanism. Furthermore, this review thoroughly discusses the nonlinearity rule concerning how the mathematical structure of the nonlinear dependence is correlated to its practical applications. This summarization is useful for identifying and guiding the potential applications of nonlinearity based on their mathematical expressions, and is helpful for new nonlinear mechanism discovery or implementation in the future, which facilitates further breakthroughs in nonlinear photoacoustics.

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Investigation of nonlinear photoacoustic microscopy using a low‐cost infrared lamp

Seong

Yang

Han

et al. 2022

Journal of Biophotonics

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Nonlinear photoacoustic microscopy (PAM) is a novel approach to enhance contrast and resolution. In this study, a low‐cost infrared (IR) lamp as a simple approach for nonlinear PAM is demonstrated. Numerical simulations are first performed to verify the nonlinear photoacoustic effect under steady heating for two cases: (a) Differentiation of absorbers with different Grüneisen coefficients; (b) enhancement of photoacoustic amplitude. Then, sets of experiments are conducted to experimentally demonstrate our proposed approach: (a) Longitudinal monitoring of photoacoustic A‐line signals from two samples, porcine tissue ex vivo and hemoglobin and indocyanine green (ICG) solutions in tubes in vitro for demonstrating the above‐mentioned two cases; (b) PAM imaging of hemoglobin and ICG solutions in tubes before and after IR lamp heating. Different signal change and amplitude enhancement are observed in different demonstrations, showing the efficacy of the proposed approach. By virtue of cost‐effectiveness and decent performance, our work facilitates nonlinear PAM studies.

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Dual-Contrast Nonlinear Photoacoustic Sensing and Imaging Based on Single High-Repetition- Rate Pulsed Laser

Cited by 14 publications

References 29 publications

Optoacoustic Sensing of Surfactant Crude Oil in Thermal Relaxation and Nonlinear Regimes

Optoacoustic Sensing of Surfactant Crude Oil in Thermal Relaxation and Nonlinear Regimes

Nonlinear mechanisms in photoacoustics—Powerful tools in photoacoustic imaging

Investigation of nonlinear photoacoustic microscopy using a low‐cost infrared lamp

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