Depth profiling of absorbing soft materials using photoacoustic methods

John A. Viator; Steven L. Jacques; Scott A. Prahl

doi:10.1109/2944.796321

Depth profiling of absorbing soft materials using photoacoustic methods

John A. Viator, Steven L. Jacques, Scott A. Prahl

Biomedical Engineering

Research output: Contribution to journal › Article › peer-review

55 Scopus citations

Abstract

A Q-switched, frequency doubled, Nd:YAG laser coupled to an optical parametric oscillator generated 4.75-ns laser pulses at 726 nm to create subsurface acoustic waves in India ink solutions, India ink acrylamide gels, and in flat segments of elastin biomaterial stained with India ink. The acoustic waves traveled through the target and were detected by a piezoelectric transducer. The waveforms were converted to measurements of initial laser induced pressure and temperature as functions of depth in the material. An algorithm based on Beer's Law was developed and applied to the acoustic signals to extract information about the absorption coefficient as a function of depth in the samples.

Original language	English (US)
Pages (from-to)	989-996
Number of pages	8
Journal	IEEE Journal on Selected Topics in Quantum Electronics
Volume	5
Issue number	4
DOIs	https://doi.org/10.1109/2944.796321
State	Published - Jul 1999

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

Access to Document

10.1109/2944.796321

Cite this

@article{388f32149ee84b45aa6cfdc38b9938bb,

title = "Depth profiling of absorbing soft materials using photoacoustic methods",

abstract = "A Q-switched, frequency doubled, Nd:YAG laser coupled to an optical parametric oscillator generated 4.75-ns laser pulses at 726 nm to create subsurface acoustic waves in India ink solutions, India ink acrylamide gels, and in flat segments of elastin biomaterial stained with India ink. The acoustic waves traveled through the target and were detected by a piezoelectric transducer. The waveforms were converted to measurements of initial laser induced pressure and temperature as functions of depth in the material. An algorithm based on Beer's Law was developed and applied to the acoustic signals to extract information about the absorption coefficient as a function of depth in the samples.",

author = "Viator, {John A.} and Jacques, {Steven L.} and Prahl, {Scott A.}",

note = "Funding Information: Manuscript received January 8, 1999; revised May 6, 1999. This work was supported by the Department of Energy under Contract DE-FG03-97-ER62346 and by the Department of the Army Combat Casualty Care Division under U.S. AMRMC Contract 95 221N-02.",

year = "1999",

month = jul,

doi = "10.1109/2944.796321",

language = "English (US)",

volume = "5",

pages = "989--996",

journal = "IEEE Journal on Selected Topics in Quantum Electronics",

issn = "1077-260X",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "4",

}

TY - JOUR

T1 - Depth profiling of absorbing soft materials using photoacoustic methods

AU - Viator, John A.

AU - Jacques, Steven L.

AU - Prahl, Scott A.

N1 - Funding Information: Manuscript received January 8, 1999; revised May 6, 1999. This work was supported by the Department of Energy under Contract DE-FG03-97-ER62346 and by the Department of the Army Combat Casualty Care Division under U.S. AMRMC Contract 95 221N-02.

PY - 1999/7

Y1 - 1999/7

N2 - A Q-switched, frequency doubled, Nd:YAG laser coupled to an optical parametric oscillator generated 4.75-ns laser pulses at 726 nm to create subsurface acoustic waves in India ink solutions, India ink acrylamide gels, and in flat segments of elastin biomaterial stained with India ink. The acoustic waves traveled through the target and were detected by a piezoelectric transducer. The waveforms were converted to measurements of initial laser induced pressure and temperature as functions of depth in the material. An algorithm based on Beer's Law was developed and applied to the acoustic signals to extract information about the absorption coefficient as a function of depth in the samples.

AB - A Q-switched, frequency doubled, Nd:YAG laser coupled to an optical parametric oscillator generated 4.75-ns laser pulses at 726 nm to create subsurface acoustic waves in India ink solutions, India ink acrylamide gels, and in flat segments of elastin biomaterial stained with India ink. The acoustic waves traveled through the target and were detected by a piezoelectric transducer. The waveforms were converted to measurements of initial laser induced pressure and temperature as functions of depth in the material. An algorithm based on Beer's Law was developed and applied to the acoustic signals to extract information about the absorption coefficient as a function of depth in the samples.

UR - http://www.scopus.com/inward/record.url?scp=0033317092&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033317092&partnerID=8YFLogxK

U2 - 10.1109/2944.796321

DO - 10.1109/2944.796321

M3 - Article

AN - SCOPUS:0033317092

SN - 1077-260X

VL - 5

SP - 989

EP - 996

JO - IEEE Journal on Selected Topics in Quantum Electronics

JF - IEEE Journal on Selected Topics in Quantum Electronics

IS - 4

ER -

Depth profiling of absorbing soft materials using photoacoustic methods

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this